I made one of these types of animation. It's not good because I was kind of just testing what I could do by splitting a sprites parts up and animating each one. uses sin waves and cosin waves I hope you enjoy it. : ) Only short though
Inspired by @mykittyonyx and their amazing art animations music is a slowed down version of dance around from the scratch library https://scratch.mit.edu/projects/1159688024/ nano animation