A tweet from 🐦 @SteveStuWill and originally from 🐦 @brusspup reminded me of one of my favourite illusions: Rolling Circles. Each individual circle is just moving back and forth on a straight line, but the combined effect creates a larger movement. Give me a shout at 🐦 @rowan_m with any comments, feel free to remix and modify with that little fish button over there 🎏↗️