Dynamic Animation in Flash: Controlling the Drawing API with Equations

We’re not actually going to draw anything on the stage at all; we’re just going to assign ActionScripts to do the drawing for us. For that we’ll need a controller movie clip off to the side of the visible area of the stage. It basically exists for us to have a container for our on(clipEvent) handlers, so it doesn’t matter what it looks like. Just draw a shape and convert it to a movie clip symbol (F8).