diff --git a/observe_main.html b/observe_main.html
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+<!DOCTYPE html>
+<html>
+  <head>
+    <link href="bootstrap-5.0.2-dist/css/bootstrap.min.css" rel="stylesheet" ></link>
+    <script src="bootstrap-5.0.2-dist/js/bootstrap.bundle.min.js" ></script>
+    <meta charset='utf-8'>
+    <style>
+
+    #output{
+      position: relative;
+      width: 100%;
+    }
+    #video_container{
+      position: relative;
+    }
+
+    #video {
+      position:absolute;
+      z-index: 15;
+      width: 100%;
+    }
+
+    #canvas-draw{
+      position:absolute;
+      z-index:10;
+      width: 100%;
+    }
+
+    #photo {
+      position:absolute;
+      z-index:5;
+      width: 100%;
+
+    }
+
+    #canvas-temp{
+      display: none;
+    }
+
+    #tables {
+      width: 100%;
+    }
+
+    #control-elements {
+      height:30em;
+    }
+
+
+
+    </style>
+  </head>
+  <body>
+    <!-- this canvas is not displayed and only used to generate the photo -->
+    <canvas id="canvas-temp"></canvas>
+
+    <div class="container">
+
+    <!-- the output div is used to display the video, the photo and the canvas where you can draw in (and measure) your organisms. -->
+    <div id="output" class="row">
+      <div id = "video_container" class="col-9">
+        <canvas id="canvas-draw"></canvas>
+        <img id="photo" alt="The screen capture will appear in this box." />
+        <video autoplay="true" id="video">	</video>
+      </div>
+
+      <div id = "control-elements" class="col-3 ">
+        <button class="btn btn-primary float-end" onclick="takePicture();" id="start-button">Take photo</button>
+
+        <form id="organism_type" class="form-check" onsubmit="return false;">
+          <input type="radio" class="btn-check" name="choice" value="Fungi" id="org-type-Fungi" checked></input>
+          <label class="btn btn-outline-success" for="org-type-Fungi">Fungi</label>
+          <input type="radio" class="btn-check" name="choice" value="Oomycete" id="org-type-Oomycete"></input>
+          <label class="btn btn-outline-success" for="org-type-Oomycete">Oomycete</label>
+          <input type="radio" class="btn-check" name="choice" value="Actinobacteria" id="org-type-Actinobacteria"></input>
+          <label class="btn btn-outline-success" for="org-type-Actinobacteria">Actinobacteria</label>
+          <input type="radio" class="btn-check" name="choice" value="Flagelate" id="org-type-Flagelate"></input>
+          <label class="btn btn-outline-success" for="org-type-Flagelate">Flagelate</label>
+          <input type="radio" class="btn-check" name="choice" value="Ciliate" id="org-type-Ciliate"></input>
+          <label class="btn btn-outline-success" for="org-type-Ciliate">Ciliate</label>
+          <input type="radio" class="btn-check" name="choice" value="Amoeba" id="org-type-Amoeba"></input>
+          <label class="btn btn-outline-success" for="org-type-Amoeba">Amoeba</label>
+        </form>
+
+        <div id="organism" class="row align-items-end">
+          <div class="col" name="Length" >
+            <label class = "form-label" for="org-length">Length [-]</label>
+            <input class="form-control" type="text" name="Length" id="org-length" value=0> </input>
+          </div>
+          <div class="col" name="Width">
+            <label class = "form-label" for="org-width">Width [-]</label>
+            <input class="form-control" type="text" name="Width" value=0 id="org-width"> </input>
+          </div>
+          <div class="col" name="Colour">
+            <label class = "form-label" for="org-colour">Colour</label>
+            <input class="form-control" type="text" name="Colour" value="" id="org-colour"> </input>
+          </div>
+          <div class="col" name="Notes" >
+            <label class = "form-label" for="org-notes">Notes</label>
+            <input class="form-control" type="textfield" name="Notes" value="" id="org-notes"> </input>
+          </div>
+        </div>
+
+        <button class="btn btn-primary float-end" id="organism_submit">submit organism</button>
+
+        <div id="organisms-table">
+          <h2> organisms </h2>
+          <table id= "org-table" style="width:100%">
+            <thead>
+            <tr>
+              <th>
+                type
+              </th>
+              <th>
+                length
+              </th>
+              <th>
+                width
+              </th>
+              <th>
+                colour
+              </th>
+              <th>
+                notes
+              </th>
+              <th>
+                actions
+              </th>
+            </tr>
+            </thead>
+            <tbody>
+            </tbody>
+          </table>
+        </div>
+        <button class="btn btn-primary float-end" onclick="push_to_FoV();">submit picture</button>
+      </div>
+
+    </div>
+
+
+    <button class="btn btn-primary float-end" onclick="toggleFullscreen();" id="fullscreen-button">toggle Fullscreen video</button>
+    <div class="row">
+      <button class="btn btn-primary float-end" onclick="toggle_cam();">Toggle camera</button>
+    </div>
+
+
+    <div id="tables">
+    <div>
+      <h2> organisms </h2>
+      <table id= "org-table" style="width:100%">
+        <thead>
+        <tr>
+          <th>
+            type
+          </th>
+          <th>
+            length
+          </th>
+          <th>
+            width
+          </th>
+          <th>
+            colour
+          </th>
+          <th style="width:40%">
+            notes
+          </th>
+          <th style="width:15%">
+            <button class="btn btn-primary float-end" id="picture_submit">next picture</button>
+          </th>
+        </tr>
+        </thead>
+        <tbody>
+        </tbody>
+      </table>
+    </div>
+
+
+    <div>
+      <h2> Field of View </h2>
+      <table id= "FoV-table" style="width:100%">
+        <thead>
+        <tr>
+          <th>
+            picture
+          </th>
+          <th>
+            Fungi [μm³]
+          </th>
+          <th>
+            Oomycete [μm³]
+          </th>
+          <th>
+            Actinobacteria [μm³]
+          </th>
+          <th>
+            Flagelate [-]
+          </th>
+          <th>
+            Ciliate [-]
+          </th>
+          <th>
+            Amoeba [-]
+          </th>
+          <th style="width:15%">
+            <button class="btn btn-primary float-end" id="FoV_submit">next FoV</button>
+          </th>
+        </tr>
+        </thead>
+        <tbody>
+        </tbody>
+      </table>
+    </div>
+
+
+    <div>
+      <h2> Reading </h2>
+      <table id= "Reading-table" style="width:100%">
+        <thead>
+          <tr>
+            <th>
+              FoV #
+            </th>
+            <th>
+              Fungi [μm³]
+            </th>
+            <th>
+              Oomycete [μm³]
+            </th>
+            <th>
+              Actinobacteria [μm³]
+            </th>
+            <th>
+              Flagelate [-]
+            </th>
+            <th>
+              Ciliate [-]
+            </th>
+            <th>
+              Amoeba [-]
+            </th>
+            <th style="width:15%">
+              <button class="btn btn-primary float-end" id="Reading_submit">next Reading</button>
+            </th>
+        </thead>
+        <tbody>
+        </tbody>
+      </table>
+    </div>
+
+
+    <div>
+      <h2> Results </h2>
+      <table id= "Result-table" style="width:100%">
+        <thead>
+          <tr>
+            <th>
+              Reading #
+            </th>
+            <th>
+              Fungi [μm³]
+            </th>
+            <th>
+              Oomycete [μm³]
+            </th>
+            <th>
+              Actinobacteria [μm³]
+            </th>
+            <th>
+              Flagelate [-]
+            </th>
+            <th>
+              Ciliate [-]
+            </th>
+            <th>
+              Amoeba [-]
+            </th>
+            <th style="width:15%">
+              <button class="btn btn-primary float-end" id="Result_submit">submit Result</button>
+            </th>
+          </tr>
+        </thead>
+        <tbody>
+        </tbody>
+      </table>
+    </div>
+    </div>
+  </div>
+    <script>
+
+      function toggleFullscreen() {
+        console.log('yay');
+        let elem = document.querySelector("#output");
+
+        if (!document.fullscreenElement) {
+          elem.requestFullscreen().catch((err) => {
+            alert(
+              `Error attempting to enable fullscreen mode: ${err.message} (${err.name})`,
+            );
+          });
+        } else {
+          document.exitFullscreen();
+        }
+
+      }
+
+
+    var video = document.querySelector("#video");
+    var out = document.querySelector("#output");
+    // width of FoV -- will be supplied by FLASK microscope setup.
+    var real_width_FoV = 255;
+
+    // init video switching get IDs of video inputs
+
+    var deviceIDs = [];
+
+    navigator.mediaDevices
+        .enumerateDevices()
+        .then((devices) => {
+          devices.forEach((device) => {
+            if (device.kind=="videoinput"){
+            deviceIDs.push(device.deviceId);
+            }
+            console.log(`${device.kind}: ${device.label} id = ${device.deviceId}`);
+          });
+        })
+        .catch((err) => {
+          console.error(`${err.name}: ${err.message}`);
+        });
+
+    // toggle between cameras
+
+    var device_index = 0;
+
+    function toggle_cam(){
+      device_index += 1
+      if (device_index>=deviceIDs.length){
+        device_index=0
+      };
+
+      if (navigator.mediaDevices.getUserMedia) {
+      navigator.mediaDevices.getUserMedia({ video: {
+        deviceId: deviceIDs[device_index],
+      }, })
+        .then(function (stream) {
+          video.srcObject = stream;
+        })
+        .catch(function (error) {
+          console.log("Something went wrong!");
+        });
+      }
+    };
+
+    // init drawing
+
+    var canvas_draw = document.querySelector("#canvas-draw");
+    var ctx = canvas_draw.getContext('2d');
+    var pos = { x: 0, y: 0 };
+
+    // store lines for measurement
+
+    var lines = [];
+    var line = [];
+
+    // calculate length of line - helper function
+
+    function get_length(line){
+      var dist = 0.0;
+        if (line){
+          for (let j = 0; j < line.length-1; ++j) {
+            dist += Math.sqrt((line[j].x - line[j+1].x) ** 2 + (line[j].y - line[j+1].y) ** 2);
+          }
+        }
+
+      return dist/canvas_draw.width
+    }
+
+    // events to set the position of the drawing cursor
+    canvas_draw.addEventListener('mousedown', setPosition);
+    canvas_draw.addEventListener('mouseenter', setPosition);
+
+    // set new position from mouse event
+    // scale canvas coords
+
+    function setPosition(e) {
+      var rect = canvas_draw.getBoundingClientRect();
+
+      scaleX = canvas_draw.width / rect.width,    // relationship bitmap vs. element for x
+      scaleY = canvas_draw.height / rect.height;
+      pos.x = (e.clientX - rect.x) * scaleX;
+      pos.y = (e.clientY - rect.y) * scaleY;
+      console.log(pos);
+    }
+
+    // the draw function to draw onto canvas
+
+    canvas_draw.addEventListener('mousemove', draw);
+
+    function draw(e) {
+      // mouse left button must be pressed and video must be hidden / a photo must have been taken.
+       if (e.buttons !== 1) {
+        // if the length of the line is 0 there is nothing to do and nothing to calculate.
+         if (line.length > 1) {
+           console.log(organism_type.choice.value);
+            switch (organism_type.choice.value){
+              // calculate length of line(s) for filamentous organisms.
+              case "Actinobacteria":
+                if (lines.length == 1){
+                  lines = [];
+                  update_canvas_draw(organisms);
+                  draw_path(line);
+                }
+              case "Oomycete":
+              case "Fungi":
+                if (lines.length == 2){
+                  lines = [];
+                  update_canvas_draw(organisms);
+                  draw_path(line);
+
+                }
+                if (lines.length == 0){
+                  organism.children.Length.children.Length.value = parseFloat(get_length(line).toFixed(3));
+                  break
+                }
+                else if (lines.length == 1){
+                  organism.children.Width.children.Width.value = parseFloat(get_length(line).toFixed(3));
+                  break
+                }
+                else {
+                  // reset lines if lines are  longer then 2
+                  organism.children.Length.children.Length.value = parseFloat(get_length(line).toFixed(3));
+                  lines = [];
+                }
+                break
+                organism.children.Length.children.Length.value = parseFloat(get_length(line).toFixed(3));
+                break
+              case "Amoeba":
+              case "Ciliate":
+              case "Flagelate":
+                let xs=[];
+                let ys=[];
+                // create a bounding box line for Protozoa.
+                x_max = Math.max(... line.map(xs=>xs.x));
+                y_max = Math.max(... line.map(ys=>ys.y));
+                x_min = Math.min(... line.map(xs=>xs.x));
+                y_min = Math.min(... line.map(ys=>ys.y));
+                line = []
+                line.push({"x":x_max,"y":y_max});
+                line.push({"x":x_max,"y":y_min});
+                line.push({"x":x_min,"y":y_min});
+                line.push({"x":x_min,"y":y_max});
+                line.push({"x":x_max,"y":y_max});
+
+            }
+            // push the line to lines array
+            lines.push(line);
+            // clear line array
+            line = [];
+         }
+         return;
+       }
+      // draw on canvas.
+      if (e.buttons == 1){
+        ctx.beginPath(); // begin
+        ctx.lineWidth = 0.5;
+        ctx.lineCap = 'round';
+        ctx.strokeStyle = 'black';
+        // update line
+        // first time push the first position
+        if (line.length==0){
+          line.push({x:pos.x, y:pos.y});
+        }
+        ctx.moveTo(pos.x, pos.y); // from
+        setPosition(e);
+        // everytime push the last position
+        line.push({x:pos.x, y:pos.y});
+        ctx.lineTo(pos.x, pos.y); // to
+        ctx.stroke(); // draw it!
+      }
+    }
+
+    function draw_path(path){
+      // draw a path on the canvas.
+      ctx.beginPath(); // begin
+      ctx.lineWidth = 0.5;
+      ctx.lineCap = 'round';
+      ctx.strokeStyle = 'black';
+      for (var i = 0; i < path.length-1; i++) {
+        ctx.moveTo(path[i].x, path[i].y);
+        ctx.lineTo(path[i+1].x, path[i+1].y);
+        ctx.stroke();
+      }
+    }
+
+    function update_canvas_draw(organisms){
+      lines=[];
+      canvas_draw.getContext('2d').clearRect(0, 0, canvas_draw.width, canvas_draw.height);
+      for (var i = 0; i < organisms.length; i++){
+        if (organisms[i].path_length){
+          draw_path(organisms[i].path_length);
+        }
+        if (organisms[i].path_width){
+          draw_path(organisms[i].path_width);
+        }
+      }
+    }
+
+    // this button sets the organism type and hides input elements
+    // according to the type of observed organism
+
+    organism_type.addEventListener('click', setOrganismType);
+
+    function setOrganismType(){
+      // first reset form when another organism type is selected.
+      var organismType = organism_type.choice.value;
+      organism.children.Length.children.Length.value = 0;
+      organism.children.Width.children.Width.value = 0;
+      organism.children.Colour.children.Colour.value = "";
+      organism.children.Notes.children.Notes.value = "";
+      // as well clear lines array to make space for new lines.
+      lines = [];
+      update_canvas_draw(organisms);
+
+      switch (organismType){
+        case "Fungi":
+          organism.children.Length.hidden = false;
+          organism.children.Width.hidden = false;
+          organism.children.Colour.hidden = false;
+          break
+        case "Oomycete":
+          organism.children.Length.hidden = false;
+          organism.children.Width.hidden = false;
+          organism.children.Colour.hidden = true;
+          break
+        case "Actinobacteria":
+          organism.children.Length.hidden = false;
+          organism.children.Width.hidden = true;
+          organism.children.Colour.hidden = true;
+          break
+        case "Flagelate":
+        case "Ciliate":
+        case "Amoeba":
+          organism.children.Length.hidden = true;
+          organism.children.Width.hidden = true;
+          organism.children.Colour.hidden = true;
+          break
+      }
+      return
+    }
+
+    // --------------------------------------------
+    // pushing organism to organisms array
+    // --------------------------------------------
+
+    // this button pushes the observed organism to organisms array.
+    organism_submit = document.querySelector("#organism_submit");
+    organism_submit.addEventListener('click', push_to_organisms);
+
+    // this is the place where data about the organism is entered.
+    var organism = document.querySelector("#organism");
+
+    // organsisms array contains a list of organisms visible in the picture together with their paths.
+    var organisms = [];
+
+    // this function pushes the observed organism into the organisms array.
+    function push_to_organisms(){
+      organisms.push({
+          "type":organism_type.choice.value,
+          "length":organism.children.Length.children.Length.value,
+          "width":organism.children.Width.children.Width.value,
+          "colour":organism.children.Colour.children.Colour.value,
+          "notes":organism.children.Notes.children.Notes.value,
+          "path_length":lines[0],
+          "path_width":lines[1],
+          }
+      );
+
+      organism.children.Length.children.Length.value = 0;
+      organism.children.Width.children.Width.value = 0;
+      organism.children.Colour.children.Colour.value = "";
+      organism.children.Notes.children.Notes.value = "";
+      update_organism_table();
+      update_canvas_draw(organisms);
+      lines=[];
+    }
+
+    // table where the organisms array is displayed
+
+    var organism_table = document.querySelector("#org-table");
+
+    // update organism table
+
+    function update_organism_table(){
+      while (organism_table.children[1].hasChildNodes()) {
+        organism_table.children[1].removeChild(organism_table.children[1].lastChild);
+        }
+      organisms.forEach((o, k) => render_organism_table(o,k));
+    }
+
+    // remove organism from organsisms and update table and canvas
+
+    function remove_organism(index){
+      organisms.splice(index, 1);
+      lines=[];
+      update_organism_table();
+      update_canvas_draw(organisms);
+    }
+
+    // make a new organism table
+    function render_organism_table(organism, index){
+      let newRow = organism_table.children[1].insertRow();
+      let type = newRow.insertCell(0);
+      let length = newRow.insertCell(1);
+      let width = newRow.insertCell(2);
+      let colour = newRow.insertCell(3);
+      let notes = newRow.insertCell(4);
+      let button = newRow.insertCell(5);
+      type.innerHTML = organism.type;
+      length.innerHTML = organism.length;
+      width.innerHTML = organism.width;
+      colour.innerHTML = organism.colour;
+      notes.innerHTML = organism.notes;
+      button.innerHTML = "<button class='btn btn-primary float-end' onclick=remove_organism(" + index + ")>remove</button>";
+    }
+
+    //----------------------------------------------
+    // push picture into FoV container
+    //----------------------------------------------
+
+    // this button pushes a picture with the associated organisms to the FoV array.
+
+    var picture_submit = document.querySelector("#picture_submit");
+    picture_submit.addEventListener('click', push_to_FoV);
+
+    var FoV_table = document.querySelector("#FoV-table");
+
+    // FoV array will contain a list of pictures with their asociated organisms array.
+
+    var FoV = [];
+
+    // this function gets called if the submit button is pressed.
+
+    function push_to_FoV(e){
+      FoV.push({
+        "picture":photo.src,
+        "organisms":organisms,
+      });
+      // reset organisms
+      organisms = [];
+      // and redraw the tables
+      update_organism_table();
+      update_FoV_table();
+
+      // reset video zIndex so you can see the video again to take the next picture.
+      video.style.zIndex = 15;
+    }
+
+    // get the total number of organisms from a picture
+
+    function total_organisms(organisms){
+      var total = {
+        "Fungi" : 0.0,
+        "Oomycete" : 0.0,
+        "Actinobacteria" : 0.0,
+        "Flagelate" : 0.0,
+        "Ciliate" : 0.0,
+        "Amoeba" : 0.0,
+      }
+      organisms.forEach((item, i) => {
+        switch (item.type){
+          case "Fungi":
+            // calculate the Volume of filamentous organisms
+            total.Fungi += item.length*real_width_FoV*
+              Math.pow((item.width*real_width_FoV),2.0)*Math.PI/4.0;
+            break
+          case "Oomycete":
+            total.Oomycete += item.length*real_width_FoV*
+              Math.pow((item.width*real_width_FoV),2.0)*Math.PI/4.0;
+            break
+          case "Actinobacteria":
+            total.Actinobacteria += item.length*real_width_FoV;
+            break
+          case "Flagelate":
+            total.Flagelate +=1;
+            break
+          case "Ciliate":
+            total.Ciliate +=1;
+            break
+          case "Amoeba":
+            total.Amoeba +=1;
+            break
+        }
+      });
+      return total;
+    }
+
+    // get total number of organisms in FoV
+    function total_organisms_in_FoV(FoV){
+      var total = {
+        "Fungi" : 0.0,
+        "Oomycete" : 0.0,
+        "Actinobacteria" : 0.0,
+        "Flagelate" : 0.0,
+        "Ciliate" : 0.0,
+        "Amoeba" : 0.0,
+      }
+      FoV.forEach((item, i) => {
+          var all_organisms_in_picture = total_organisms(item.organisms);
+          var keys = Object.keys(all_organisms_in_picture);
+          for (var i = 0; i < keys.length; ++i) {
+            total[keys[i]] += all_organisms_in_picture[keys[i]];
+          }
+        });
+      return total;
+    }
+
+    // update the FoV Table = delete all rows and recreate from FoV array
+    function update_FoV_table(){
+      //remove all rows
+      while (FoV_table.children[1].hasChildNodes()) {
+        FoV_table.children[1].removeChild(FoV_table.children[1].lastChild);
+        }
+      // recreate table
+      FoV.forEach((o, k) => render_FoV_table(o,k));
+      // check if FoV list is empty
+      if(FoV.length>0){
+        // add a row in the end with the summed up values for all organism types
+        let tot = total_organisms_in_FoV(FoV);
+        let newRow = FoV_table.children[1].insertRow();
+        newRow.style.borderTop = "solid #000000";
+        let image = newRow.insertCell(0);
+        let fungi = newRow.insertCell(1);
+        let oomycete = newRow.insertCell(2);
+        let actinobacteria = newRow.insertCell(3);
+        let flagelate = newRow.insertCell(4);
+        let ciliate = newRow.insertCell(5);
+        let amoeba = newRow.insertCell(6);
+        let button = newRow.insertCell(7);
+        image.innerHTML = "total"
+        fungi.innerHTML = tot.Fungi.toFixed(5).replace(/\.?0*$/,'');
+        oomycete.innerHTML = tot.Oomycete.toFixed(5).replace(/\.?0*$/,'');
+        actinobacteria.innerHTML = tot.Actinobacteria.toFixed(5).replace(/\.?0*$/,'');
+        flagelate.innerHTML = tot.Flagelate;
+        ciliate.innerHTML = tot.Ciliate;
+        amoeba.innerHTML = tot.Amoeba;
+      }
+    }
+
+    function render_FoV_table(element, i){
+      var img = new Image();
+      img.src = element.picture;
+      let tot = total_organisms(element.organisms);
+      let newRow = FoV_table.children[1].insertRow();
+      let image = newRow.insertCell(0);
+      let fungi = newRow.insertCell(1);
+      let oomycete = newRow.insertCell(2);
+      let actinobacteria = newRow.insertCell(3);
+      let flagelate = newRow.insertCell(4);
+      let ciliate = newRow.insertCell(5);
+      let amoeba = newRow.insertCell(6);
+      let button = newRow.insertCell(7);
+      image.appendChild(img).style.width = "50px";
+      fungi.innerHTML = tot.Fungi.toFixed(5).replace(/\.?0*$/,'');
+      oomycete.innerHTML = tot.Oomycete.toFixed(5).replace(/\.?0*$/,'');
+      actinobacteria.innerHTML = tot.Actinobacteria.toFixed(5).replace(/\.?0*$/,'');
+      flagelate.innerHTML = tot.Flagelate;
+      ciliate.innerHTML = tot.Ciliate;
+      amoeba.innerHTML = tot.Amoeba;
+      button.innerHTML = "<button class='btn btn-primary float-end' onclick=remove_picture("+i+")>remove</button>";
+    }
+
+    // remove the image at position index from table
+
+    function remove_picture(index){
+      FoV.splice(index, 1);
+      update_FoV_table();
+    }
+
+    //--------------------------------------
+    // push FoV into Reading container
+    //--------------------------------------
+
+    //button reference to submit FoV to reading array
+    var FoV_submit = document.querySelector("#FoV_submit");
+
+    // add event listener to button
+    FoV_submit.addEventListener('click', push_to_reading);
+
+    function get_standard_deviation(reading){
+      var total = {
+        "Fungi" : 0.0,
+        "Oomycete" : 0.0,
+        "Actinobacteria" : 0.0,
+        "Flagelate" : 0.0,
+        "Ciliate" : 0.0,
+        "Amoeba" : 0.0,
+      }
+      reading.forEach((item, index) => {
+          var all_organisms_in_FoV = total_organisms_in_FoV(item);
+          var keys = Object.keys(all_organisms_in_FoV);
+          for (var i = 0; i < keys.length; ++i) {
+            total[keys[i]] += all_organisms_in_FoV[keys[i]];
+          }
+      });
+      var mean = {};
+      var standard_deviation = {};
+      var keys = Object.keys(total);
+      for (var i = 0; i < keys.length; ++i) {
+        mean[keys[i]] = total[keys[i]]/reading.length;
+        standard_deviation[keys[i]] = 0;
+      }
+      reading.forEach((item, index) => {
+          var all_organisms_in_FoV = total_organisms_in_FoV(item);
+          var keys = Object.keys(all_organisms_in_FoV);
+          for (var i = 0; i < keys.length; ++i) {
+            standard_deviation[keys[i]] += Math.pow(all_organisms_in_FoV[keys[i]]-mean[keys[i]], 2);
+          }
+      });
+      for (var i = 0; i < keys.length; ++i) {
+        standard_deviation[keys[i]] = Math.sqrt(standard_deviation[keys[i]]/reading.length);
+      }
+      return {"mean" : mean, "standard_deviation" : standard_deviation};
+    }
+
+    // reading array contains a list of n FoV arrays where n is the number of FoVs per reading.
+
+    var reading = [];
+
+    // push FoV to reading array and update FoV and Reading Tables as well as FoV array
+
+    function push_to_reading(e){
+      reading.push(FoV);
+      update_Reading_table();
+      FoV = [];
+      update_FoV_table();
+    }
+
+    // this is the reference to the table
+
+    var Reading_table = document.querySelector("#Reading-table");
+
+    // update function for Reading table
+
+    function update_Reading_table(){
+      //remove all rows
+      while (Reading_table.children[1].hasChildNodes()) {
+        Reading_table.children[1].removeChild(Reading_table.children[1].lastChild);
+        }
+      reading.forEach((item, i) => render_Reading_table(item,i));
+      // add last row with mean and standard deviation for FoVs in Readings if reading is not empty
+
+      if (reading.length>0){
+        let result = get_standard_deviation(reading);
+        let mean = result.mean;
+        let standard_deviation = result.standard_deviation;
+        let newRow = Reading_table.children[1].insertRow();
+        newRow.style.borderTop = "solid #000000";
+        let number = newRow.insertCell(0);
+        let fungi = newRow.insertCell(1);
+        let oomycete = newRow.insertCell(2);
+        let actinobacteria = newRow.insertCell(3);
+        let flagelate = newRow.insertCell(4);
+        let ciliate = newRow.insertCell(5);
+        let amoeba = newRow.insertCell(6);
+        let button = newRow.insertCell(7);
+        number.innerHTML = "mean";
+        fungi.innerHTML = mean.Fungi.toFixed(2).replace(/\.?0*$/,'');
+        oomycete.innerHTML = mean.Oomycete.toFixed(2).replace(/\.?0*$/,'');
+        actinobacteria.innerHTML = mean.Actinobacteria.toFixed(2).replace(/\.?0*$/,'');
+        flagelate.innerHTML = mean.Flagelate.toFixed(2).replace(/\.?0*$/,'');
+        ciliate.innerHTML = mean.Ciliate.toFixed(2).replace(/\.?0*$/,'');
+        amoeba.innerHTML = mean.Amoeba.toFixed(2).replace(/\.?0*$/,'');
+        button.innerHTML = "";
+
+        newRow = Reading_table.children[1].insertRow();
+        number = newRow.insertCell(0);
+        fungi = newRow.insertCell(1);
+        oomycete = newRow.insertCell(2);
+        actinobacteria = newRow.insertCell(3);
+        flagelate = newRow.insertCell(4);
+        ciliate = newRow.insertCell(5);
+        amoeba = newRow.insertCell(6);
+        button = newRow.insertCell(7);
+        number.innerHTML = "standard deviation";
+        fungi.innerHTML = standard_deviation.Fungi.toFixed(2).replace(/\.?0*$/,'');
+        oomycete.innerHTML = standard_deviation.Oomycete.toFixed(2).replace(/\.?0*$/,'');
+        actinobacteria.innerHTML = standard_deviation.Actinobacteria.toFixed(2).replace(/\.?0*$/,'');
+        flagelate.innerHTML = standard_deviation.Flagelate.toFixed(2).replace(/\.?0*$/,'');
+        ciliate.innerHTML = standard_deviation.Ciliate.toFixed(2).replace(/\.?0*$/,'');
+        amoeba.innerHTML = standard_deviation.Amoeba.toFixed(2).replace(/\.?0*$/,'');
+        button.innerHTML = "";
+      }
+
+    }
+
+    // remove a FoV at position index from reading
+
+    function remove_FoV(index){
+      reading.splice(index, 1);
+      update_Reading_table();
+    }
+
+    // render a line of the Reading table
+
+    function render_Reading_table(item, i){
+        tot = total_organisms_in_FoV(item);
+        let newRow = Reading_table.children[1].insertRow();
+        let number = newRow.insertCell(0);
+        let fungi = newRow.insertCell(1);
+        let oomycete = newRow.insertCell(2);
+        let actinobacteria = newRow.insertCell(3);
+        let flagelate = newRow.insertCell(4);
+        let ciliate = newRow.insertCell(5);
+        let amoeba = newRow.insertCell(6);
+        let button = newRow.insertCell(7);
+        number.innerHTML = i+1;
+        fungi.innerHTML = tot.Fungi.toFixed(5).replace(/\.?0*$/,'');
+        oomycete.innerHTML = tot.Oomycete.toFixed(5).replace(/\.?0*$/,'');
+        actinobacteria.innerHTML = tot.Actinobacteria.toFixed(5).replace(/\.?0*$/,'');
+        flagelate.innerHTML = tot.Flagelate.toFixed(5).replace(/\.?0*$/,'');
+        ciliate.innerHTML = tot.Ciliate.toFixed(5).replace(/\.?0*$/,'');
+        amoeba.innerHTML = tot.Amoeba.toFixed(5).replace(/\.?0*$/,'');
+        button.innerHTML = "<button class='btn btn-primary float-end' onclick=remove_FoV("+i+")>remove</button>";
+    }
+
+    //--------------------------------------
+    // push Reading into Result container
+    //--------------------------------------
+
+    var Reading_submit = document.querySelector("#Reading_submit");
+    Reading_submit.addEventListener('click', push_to_result);
+    // result array contains a list of n reading arrays where n is the number of Readings.
+    var result = [];
+
+    // this function gets called if the button is pressed.
+    function push_to_result(e){
+      result.push(reading);
+      reading = [];
+      update_Reading_table();
+      update_Result_table();
+    }
+    var Result_table = document.querySelector("#Result-table");
+
+    function update_Result_table(){
+      //remove all rows
+      while (Result_table.children[1].hasChildNodes()) {
+        Result_table.children[1].removeChild(Result_table.children[1].lastChild);
+        }
+      result.forEach((item, i) => render_Result_table(item,i));
+    }
+
+    function remove_reading(index){
+      result.splice(index, 1);
+      update_Result_table();
+    }
+
+    function render_Result_table(reading, i){
+      let result = get_standard_deviation(reading);
+      let newRow = Result_table.children[1].insertRow();
+      let number = newRow.insertCell(0);
+      let fungi = newRow.insertCell(1);
+      let oomycete = newRow.insertCell(2);
+      let actinobacteria = newRow.insertCell(3);
+      let flagelate = newRow.insertCell(4);
+      let ciliate = newRow.insertCell(5);
+      let amoeba = newRow.insertCell(6);
+      let button = newRow.insertCell(7);
+      number.innerHTML = i+1;
+      fungi.innerHTML = result["mean"].Fungi.toFixed(2).replace(/\.?0*$/,'') + " +/- "
+       + result["standard_deviation"].Fungi.toFixed(2).replace(/\.?0*$/,'');
+      oomycete.innerHTML = result["mean"].Oomycete.toFixed(2).replace(/\.?0*$/,'') + " +/- "
+       + result["standard_deviation"].Oomycete.toFixed(2).replace(/\.?0*$/,'');
+      actinobacteria.innerHTML = result["mean"].Actinobacteria.toFixed(2).replace(/\.?0*$/,'') + " +/- "
+       + result["standard_deviation"].Actinobacteria.toFixed(2).replace(/\.?0*$/,'');
+      flagelate.innerHTML = result["mean"].Flagelate.toFixed(2).replace(/\.?0*$/,'') + " +/- "
+       + result["standard_deviation"].Flagelate.toFixed(2).replace(/\.?0*$/,'');
+      ciliate.innerHTML = result["mean"].Ciliate.toFixed(2).replace(/\.?0*$/,'') + " +/- "
+       + result["standard_deviation"].Ciliate.toFixed(2).replace(/\.?0*$/,'');
+      amoeba.innerHTML = result["mean"].Amoeba.toFixed(2).replace(/\.?0*$/,'') + " +/- "
+       + result["standard_deviation"].Amoeba.toFixed(2).replace(/\.?0*$/,'');
+      button.innerHTML = "<button class='btn btn-primary float-end' onclick=remove_reading("+i+")>remove</button>";
+    }
+
+    //--------------------------------------
+    //in the end everything should get send to the Flask Backend
+    //--------------------------------------
+
+    var result_submit = document.querySelector("#Result_submit");
+    result_submit.addEventListener('click', send_result_to_backend);
+
+    function send_result_to_backend(){
+      return;
+    }
+
+
+      let streaming = false;
+
+      function startup() {
+        setOrganismType()
+        output = document.getElementById("output");
+        video = document.getElementById("video");
+        canvas = document.getElementById("canvas-temp");
+        photo = document.getElementById("photo");
+        startButton = document.getElementById("start-button");
+
+        navigator.mediaDevices
+          .getUserMedia({ video: {width: { ideal: 99999} , height: { ideal: 99999 }}, audio: false })
+          .then((stream) => {
+            video.srcObject = stream;
+            video.play();
+          })
+          .catch((err) => {
+            console.error(`An error occurred: ${err}`);
+          });
+
+        video.addEventListener(
+          "canplay",
+          (ev) => {
+            if (!streaming) {
+              video_aspect = video.videoWidth  / video.videoHeight;
+
+              video.style.aspectRatio = video_aspect;
+
+              photo.style.aspectRatio = video_aspect;
+
+              canvas.style.aspectRatio = video_aspect;
+
+              canvas_draw.style.aspectRatio = video_aspect;
+              canvas_draw.width = canvas_draw.width*5;
+              canvas_draw.height = canvas_draw.height*5;
+              streaming = true;
+            }
+          },
+          false,
+        );
+
+        startButton.addEventListener(
+          "click",
+          (ev) => {
+            takePicture();
+            ev.preventDefault();
+          },
+          false,
+        );
+
+        clearPhoto();
+      }
+
+      // Fill the photo with an indication that none has been
+      // captured.
+
+      function clearPhoto() {
+        const context = canvas.getContext("2d");
+
+        context.fillRect(0, 0, canvas.width, canvas.height);
+
+        const data = canvas.toDataURL("image/png");
+        photo.setAttribute("src", data);
+      }
+
+      // Capture a photo by fetching the current contents of the video
+      // and drawing it into a canvas, then converting that to a PNG
+      // format data URL. By drawing it on an offscreen canvas and then
+      // drawing that to the screen, we can change its size and/or apply
+      // other changes before drawing it.
+
+      function takePicture() {
+        canvas_draw.getContext('2d').clearRect(0, 0, canvas_draw.width, canvas_draw.height);
+        const context = canvas.getContext("2d");
+        if (video.videoWidth && video.videoHeight) {
+          canvas.width = video.videoWidth;
+          canvas.height = video.videoHeight;
+          context.drawImage(video, 0, 0, video.videoWidth, video.videoHeight);
+          video.style.zIndex = 1;
+          photo.style.zIndex = 5;
+          canvas.style.zIndex= 10;
+
+          const data = canvas.toDataURL("image/png");
+          photo.setAttribute("src", data);
+        } else {
+          clearPhoto();
+        }
+      }
+
+      // Set up our event listener to run the startup process
+      // once loading is complete.
+      window.addEventListener("load", startup, false);
+    //})();
+
+
+    </script>
+  </body>
+</html>
