Balls random jumping on Y and on demand stop at random fixed positions?!

I’m a real newbie when it comes to AS2 …[COLOR=SandyBrown]** I have this problem** [/COLOR]… when you press PLAY the balls must randomly bounce up & down and overlaping, on STOP they should tween into random Y position (there is 6 positions possible).
**[COLOR=SandyBrown]I’m posting a fla[/COLOR] **of what I’ve done so far … The AS is on the buttons …
If only somebody could help me out … please