Turbo mode is fun! (hint: You do turbo mode by holding down the SHIFT button while you click the green flag)
Gosh, this is my first featured project! How exciting! ^.^ Check out version 2: https://scratch.mit.edu/projects/375367706/ I saw something like this on MOIllusions.com and this is me trying to re-create it. The dots all move across the diameter of the circle. If I'd gotten all my math right, they'd always make a perfect octagon. Feel free to remix if you think you can improve it, the comments should explain everything. But no cheating by making an octagon roll around the circle, the dots have to move individually. ;) Based on: http://www.moillusions.com/2013/09/merry-go-round-animated-illusion.html