I've been working on this project for one and a half hours, and I finally finished part 1 (I'm a bit low bc I haven't done this type of project before :P)! The background moves by itself (to the verses of the song), so don't worry! Also it's gonna stop changing at the end of Cocoa's part, but I think I'm gonna make a part 2. Enjoy! (don't mind the pictures; the second time music plays, they will be off) Enjoy!
Part 2 is finally finished! Here is a link: https://scratch.mit.edu/projects/1299609649/