def drawShape(eventType, channel, data1, data2):

   global window, shape1, shape2, shape3, shape4, shape5, shape6

   # iicon position is random
   x = randint(0, getScreenWidth())     # x may be anywhere on display
   y = randint(0, getScreenHeight()) # y may be anywhere on display


   colors = ["Red", "Orange", "Yellow", "Green", "Blue", "Purple", "Pink", "White", "Teal"]
   colorIdx = (data1 / 2) % len(colors)
   color = colors[colorIdx]

   shapeLists = [shape1, shape2, shape3, shape4, shape5, shape6]
   shapeListIdx = (data1 / 3) % len(shapeLists)
   shapeList = shapeLists[shapeListIdx]
   shape = shapeList[color]
   icon = Icon(shape,x,y)
   window.add(icon)

   # play note
   Play.noteOn(data1, data2)

# establish a connection to an input MIDI device
midiIn = MidiIn("Unknown Vendor Oxygen 25")


# register a callback function to process incoming MIDI events
midiIn.onNoteOn(drawShape)