Here is another thing I made that is relaxing to watch with music… It involves rotating shapes. The shapes are part of an artificial world whose components slowly fade into existence on the left, then move and fade out from existence on the right. In between, they “experience” what they can. A “camera” follows some of these shapes with an animated zoom perspective.
Here is a reference to a capture of an earlier version of this that I made without the changing perspectives and put on youtube: