Random Movement w/ Collision

Hi everyone,

A while ago I created this animation in Flash:

http://dl.dropbox.com/u/19109081/timeline_animation.mov

Thing is it’s a timeline animation and my boss now wants it scripted, so he can change the different library objects with whatever commands we want. Don’t worry about the objects now.
My issue here is the **random movement **to points outside the stage, while tweening through the stage on the way to those points, and the actual collision. So something like an array of objects to start with (so that I can add or subtract, as I please) is enough.

Anyone got know of a script, tutorial or hints on how to even get started on scripting something like this?

Much appreciated!