[https://www.youtube.com/watch?v=pNe6fsaCVtI]YouTu...  ...an optical illusion of sorts in the form of white circles inside a larger red circle. The simplicity of the...  ...a rotating square forms when there are four white circles inside the red one. Via IFL Science.

Ben Heine, the artist behind the...  ...This portrait is only made with "flat circles " on a black background. Every ci...  ...ow I'm exploiting this technique with circles ... Link | His full Digit...