In this activity, you will be introduced to some of the basic elements of frame-by-frame animation and the layout of Adobe Flash. Follow the steps below to get started and use this introductory skill to see what you can create.
Step 2: Save As, "yournameflashintro.fla"
Step 4: Click the oval tool and make a circle in your project.
Step 6: For each new keyframe you will move the circle a little bit more to create the bouncy effect.
Source: http://www.adobe.com/devnet/flash/articles/flash_cs5_createfla.html