Based on a [url=https://twitter.com/panlepan/status/955175778269958145]tweet by Vincent Pantaloni[/url]:[br][br]Number each circle along the bottom 1, 2, 3... (from left to right)[br]Number each circle on the left 1, 2, 3... (from the bottom up)[br][br]Rotate a point on circles #1 by the angle, circles #2 by twice the angle, circles #3 by three times the angle, etc.