So I left it on for as long as I could stand looking at it and it did not change for me. Maybe I didnt leave it up long enough, or it's an issue with your particular device. I can suggest that if you really want this wallpaper with the color sequence as intended, you can create and run the following routine, so you don't have to manually keep switching the wallpaper. Tweak the routine to the parametrs you think works best.
