Flash is mainly used for animation worldwide, now let's
learn how to make some. In this section, we'll learn how to
create Motion Tweens and Shape Tweens. You can also have
animation's change colors, resize, rotate and more.
Creating Tweened Symbols:
From your menu, go to 'Insert> New Symbol'. Choose 'Movie
Clip' from the options and name it my clip. You will be
taken to a new stage area similar to the main stage. Draw a
small circle, then select it, and go to 'Insert> Create Motion
Tween'. Choose frame 25 from your timeline and hit F6 on your
keyboard. All the frames from frame 1 to frame 25 are now
purple, and have an arrow line pointing to frame 25.

While frame 25 is still selected, take your
circle shape, and move it to another spot on your stage. Hit
Enter, and you're circle will move on it's own.
Creating Shape Tweens:
Shape tweens are a different source of tweening. You do not
need to have symbols, just basic drawings. Create a new
symbol, choose movie clip and name is my clip 2. Create a
circle, select frame 1, then open your Frame Panel, CTRL+F.
From the panel, select Shape from the drop down menu, and now
select frame 25 and hit F6. This time you will notice a green
set of frames.

On frame 25, delete your circle by selecting
it and draw a square. Hit ENTER and you'll see your circle
morphing into a square. That's it for shape tweening.