1.) The first step is to open Flash
2.) The second step is to choose the right "actionscript" actionscript is the version of scripting you use. Choose ActionScript 2.0
3.) After opening actionscript 2.0, click the rectangle tool.
4.) Make a rectangle or square (its your choice it dont make no difference
5.) Now it's time to make your shape move. Right click on your shape and click "create motion tween"
6.) A box will pop up saying this. click ok.
7.) Move the shape in the direction you want the shape to move
8.) now save your work. File, Save
9.) After you have saved click "Ctrl and Enter" at the same time and that will export your Motion Tween