Here's two ways to make a sprite look like a flowing rainbow when changing its color effect. Press space or tap to alternate slides. Easy: Apply a red to yellow gradient with the paint bucket. Hard: Put a big square over a color spectrum, then erase parts of the square to draw.
[A] This project was originally shared on @S_Cabbage. Publish date: Apr 5, 2023 This is one of the only projects I've had yet to re-share, purely due to how low-effort it is.