bayonetta requirements:  must be 9 feet tall

legs must be twice length of torso

hair must be a demon

also clothes

This is undoubtedly one of the coolest illusions that I've ever seen: Color Spiral
It's amazing how the human mind can trick us into perceiving things differently than they actually are.

thats not really what is happening there at all

ps zoom in. this is why screens have black borders.

okay well my statement was a little stronger than it should have been but people aren't wowed/amazed/impressed because of blending colors because yes at a micro level like that pixel per pixel stuff it is expected but this is a macro image where you can see each line of color as part of the whole thing so it's a little more shocking!