adapted from: http://en.gentoo-wiki.com/wiki/GIMP_Fractal_Backgrounds
Yes I know these are not actually mathematical fractals. But, let’s call them fractal-looking backgrounds. 
Here are seven easy steps to make cool fractal looking desktop backgrounds with the gimp!
Step 1:
Create a new image with the gimp with your desired image size. Set ‘Fill with’ to Foreground color.
Step 2:
Click on Filters > Render > Nature > Flame
Step 3:
Adjust Zoom to 3.00, then click Edit.
Step 4:
Change Variation to Spherical. Adjust the Speed here as well if you would like. Then click OK.
Step 5:
No step, just click OK. This may take a few minutes depending on your computer power.
Step 6:
Click on Colors > Colorize…
Step 7:
Adjust the Hue value as desired. Slide it back and forth to find a color you like then hit OK.
Done!
You are done! Save the file as a .png and share with your buds and impress chicks with your gimp-fu.
