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Movie Clip Behavior

Some people wrongly think that Graphic symbols are only for when the symbol contains a single frame and Movie Clips are only for when you have multiple frames. You can work this way, but there's more to it. For example, say you make a Graphic symbol of a wheel (a circle with lines for spokes). You can then use an instance of your Wheel symbol inside a Movie Clip called Rotating Wheel—where the Wheel symbol rotates. Then the Movie Clip can be used in the creation of a Car symbol (which is a Graphic symbol because the car itself won't need multiple frames). Finally, the Car symbol can be animated across the screen, and both wheels will rotate the whole time. Don't worry if this is confusing; we'll do an exercise presently to make it clear. Just remember: You can use Movie Clips even when you don't need multiple frames.

Creating a Movie Clip

Making a Movie Clip is like making any symbol. We're going to first create an animation inside the Movie Clip. Then, when we tween an instance of the clip, it will tween as well as animate. Specifically, we'll make a wheel and then use an instance of that wheel to create a rotating wheel. Finally, we'll use two rotating wheels to create a car symbol. We'll animate the car (and see its wheels rotating, too).


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