Click the green flag, then press space, and wait a minute or two to see Sierpinski's triangle. Turbo mode helps to make it go faster.
How it works is that the dot in the middle travels halfway to any of the three points on the outside, and as you can see, it makes a fractal. This is kind of just a project to show that I am still here (kind of), but it's also math, and it's cool. After a while, I decided to make several cursors to plot the dots to help it go faster.