This is just an engine to make something like the "moving snakes" illusion". If you move your eyes between the different solid black dots, you might feel like the different circular patterns are rotating! You can adjust the colors using the color sliders. If you set them, they will hold their value when you click the green flag, so you can see what those color combinations look like. Use the "Preset 1" and "Preset 2" buttons to see 2 of my favorites. Write in the comments what you think are some good color patterns to try. You can remix with your favorite color combinations, just re-do the "Preset" buttons.
Thanks to all the testers! Thanks to Akiyoshi Kitaoka for creating the original illusion! Original paper here: Kitaoka A, Ashida H (2003) Phenomenal characteristics of the peripheral drift illusion. VISION 15:261–262. You can Google "moving snakes illusion" to see a high resolution version where the effect is a lot stronger than it is here.
