Turbo Mode recommended. Polygon represents the number of sides the figure has.
Just thought I'd make a little project to visualize how the regular polygon generator I used for the "Chaos Game" changes over time. It creates a polygon based on a radius, because I wanted to keep them all roughly to the same scale, but a nice consequence of that is that as you approach infinity it approximates a circle. Unfortunately, this only goes to 100, but Scratch has a low enough resolution that it's good enough.