Animation on command!

I didn't want to make two posts in a row, but I also wanna know something else, how would i go about making a script for a pose ball that when you press up or something it does an animation, like say you wanted to raise your hand in a class or something you could hit the up button and it puts yur hand up and down real quick

Requires PERMISSION_TAKE_CONTROLS and the fanction is llTakeControls.