Will and Guy love 'playing' mind games with these circles. Take the time to sit back and let the primeval parts of your brain take over.
I find it difficult to get my head around these 4 perfectly round circles.
Ferris Wheel - Another Circle Optical Illusion
This reminds Will and Guy of the London Eye. It's truly mesmerising the way that the blobs or pin-heads seem to rotate clockwise. While our brain tells us they are still, our eyes are telling us that there is a circular motion.