diff --git a/pump_volume.py b/pump_volume.py
new file mode 100644
index 0000000..001324a
--- /dev/null
+++ b/pump_volume.py
@@ -0,0 +1,21 @@
+from adafruit_motor import stepper
+from adafruit_motorkit import MotorKit
+from time import sleep
+
+kit = MotorKit()
+
+pump = kit.stepper2
+
+pump.release()
+
+
+
+def pump_volume(vol):
+    nb_step=vol*507 #35000steps for 69g with sleep(0.05) in between 2 steps
+    for i in range(nb_step):
+        pump.onestep(direction=stepper.FORWARD, style=stepper.DOUBLE)
+        sleep(0.05)
+    pump.release()
+    
+    
+pump_volume(5)