So many ways to make things spin: use keyframes, or the Spin behavior (in Basic Motion) or add a Rate parameter behavior to the Rotation Z parameter. Keyframes are good if you want the spinning to start and/or stop; behaviors are a little better for ongoing animation.
—
Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
https://www.applemotion.net