Google "Download Apophysis", then see what you can do. It's a really cool program. I also like Chaoscope. If you'rre having problems saving your fractals into images, you can use the button above Insert to take a screenshot of your screen then figure out what you want to do with it. By the way, a fractal is an image your repeat over and over again, sometimes bigger and sometimes smaller. Exemple, a triangle, with the same triangle, except smaller inside, with a triangle, except smaller inside... and so on. You'll figure it out.