I now know what the <mouse down?> block does. it triggers a certain script when you click with the mouse. When you press the left clicker on the mouse, the disc will vibrate.
___________________ IForever_____________ I I(If <mouse down> then) I I (change y by -2) I I (wait 0.01 seconds) I I (change y by -2) I I (wait 0.01 seconds) I ________________ I__________________
