diff --git a/observe_bact.html b/observe_bact.html
index 4bb9936..1cd6bbc 100644
--- a/observe_bact.html
+++ b/observe_bact.html
@@ -96,7 +96,6 @@
     </div>
 
     </div>
-    <canvas id="canvas-debug"></canvas>
 
   </div>
 
@@ -137,10 +136,20 @@
       return (last_rect.x-rect.x)**2 + (last_rect.y-rect.y)**2;
     }
 
-
+    var opencv_runing = false;
 
     function do_opencv_magic() {
 
+      if (opencv_runing){
+        streaming = false;
+        opencv_runing = false;
+
+        startup();
+      }
+      else {
+        opencv_runing = true;
+        streaming = true;
+      }
       var cap = new cv.VideoCapture(video);
       let src = new cv.Mat(video.offsetHeight, video.offsetWidth, cv.CV_8UC4);
       let dst = new cv.Mat(video.offsetHeight, video.offsetWidth, cv.CV_8UC1);
@@ -161,14 +170,6 @@
         let fits = [];
         let rects = [];
 
-        //for (let k = 0; k < objects_tracked.length; ++k){
-        //  if (objects_tracked[k].at(-1)[0] < framecount-1){
-        //    objects_lost.push(objects_tracked[k]);
-        //    objects_tracked.splice(k, 1);
-        //  }
-        //}
-        //console.log(objects_last);
-
         try {
           if (!streaming) {
             // clean and stop.