What if I want it to move forever side by side? Do I add a loop block?

Answer 1

Yes, you'll need a loop and you'll have to change direction of your animation based on the position of the shape you're animating. Check this code out and ask questions if you need:
https://code.sololearn.com/Wi3p3Ham9qJ5/?ref=app

Answer 2

Thank you Zeke Williams. I'll study your code and might ask questions in the ff days. Amazing work. This is awesome!