Very simple. Enter the number of sides you want you polygon to have (at least 3) and your polygon will form. To see a closed polygon, you must have 99 sides or less. If you go inside and change the size of the polygon, the maximum size will change (Ex. 2 steps the maximum is 492).
My mom came up with this today. So I made this very simple project. By the way, notice it's 1s1s1c.
