This program generates a fractal. Follow instructions in project. Each time the render gets more complicated it is because the program is doing another cycle. When you choose an example the program will keep doing that infinitely. If you want to go to a cycle and stop, copy and paste the data in the list. To stop a fractal generating stop the project at any time and repress the green flag.
By me with information about Turtle Graphics I will add more fractals later. If this gets enough views I will add a tutorial to show you how to make your own fractal. If anything is confusing feel free to ask.