How to Trigger this action? ( Simple Newbie Q Please)

Hi All, I have a very simple question and I’d be glad for any suggestion for the same.

Let us say, I have an actionscripted animation on frame one, how do I trigger it to go to another frame and perfrom the actions there after completing the action on the first frame?

To illustrate, I have uploaded a trigger.fla with basic animations on frame 1 and frame 20.

How do I make the movie play out frame 1 and when that ball reaches 200px, go to frame 20 and play that action?

My purpose in this is to understand how to trigger the next event after the completion of the previous event. I appreciate help and directions towards the best way to do such. I know this is probably a very silly question for you all, but a big step for me.

Grateful and Thank You for the help.

soul