This is a visual representation of the math number Pi. NOTE: this picture is achieved with 9 colors only. One for each digit, (1,2,3,4,5,6,7,8,9,0). I am currently working on a sort of "game" where you can edit the colors and make your own picture. This is a work in progress. I am trying to fix the red thing at the bottom.
Credits to: @rk1212 for the idea. He is working on one too. Check out his page.