| Recently, one of my readers requested a FlashR tutorial about how to create an animation that starts with a solid colored stage and gradually reveals the background underneath. One way to do this is to use solid colored circles, or any other shape. Starting with the stage completely covered and as the circles are removed, the background is revealed.|
Your first thought might be to draw many individual circles on the stage and convert them all to movie clips. However, we only need one circle movie clip and then, we will use several instances of that movie clip.
The reason that we use only one movie clip instead of several is because it is less CPU intensive for Flash to draw several instances of the same movie clip on the stage than it is to draw several individual movie clips.
As you would expect, we start with a new ActionScript 3 project. Our first step is to import the background image onto the first layer of the Flash timeline. Then we will create the circle movie clip and build the animation.
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