You can make a shape move along any path you want.
Start by making a ten-frame animation like you did in Step 3:
First, in a new Flash document, use the Oval tool to create a circle at the top of the Stage.
Next, click on frame 10 in the
Timeline and select <Insert > Timeline > Keyframe>.
Highlight frames 1 through 10 and select <Insert > Timeline > Create Motion Tween>.
Highlight frame 10.
Move the oval to the bottom-right corner of the Stage and hit <Enter>.