I made these images at the beginning 
  of the year (well, I ripped them out of the Purdue screen saver) ... anyway, 
  they can make a pretty good desktop wallpaper if you set your background to 
  black and center it.
  
  
  Here's a pretty normal-sized version:
   
 
  
  
  And here's a ridiculously huge one if you happen to want it:
  