All these fractals are made using the flame algorithm from Scott Draves. You can reset or start a new fractal using the reset/start button and with the slider you can pick a fractal. I am not sure if the 5th one really is a fractal, but it looks cool anyway.
Turbo mode is recommendend! It will still take some time to create the fractal even when you use turbo mode. I originally made this for a school project. I also made some 3d ones with the transparent pen, but unfortenately I lost the code for those.
