The simple demo above shows the difference between what you can achieve using just the visual design tools in Flash (frame animation in the timeline) and what you can achieve with ActionScript. The motion of the red ball is entirely governed by keyframe animation. The blue object executes ActionScript instructions on every frame to determine its horizontal and vertical position and its rate of travel.
If you watch for a few seconds, you'll see that the path of the red ball is entirely predictable, while its counterpart is capable of surprises.
