To create a Motion tween you will first have to
make sure that you are using a Graphic Symbol.
Place the River picture on the Stage and set this as the Background
Layer.
Step 1 - Create a new
layer named Frog and drag the Frog Symbol onto the Stage. Position
the Frog so that it's at the bottom left of the San Antonio River.
Notice how you've now set a Keyframe in Frame 1?
Step 2 - Select the Transform tool
and click on the Frog and make the Frog smaller. At the same time
drag it to the end of the river. Add a Keyframe at Frame 40. Add a
Keyframe at Frame 40 for your background as well.
Step 3 - On the Timeline click between
frames 1 and 40 and add a MOTION
tween.
Play your movie!
Step 4 - Look back in Properties
and see the option to Rotate during the Motion tween.