The challenge: To use a predetermined string (that's tanglespeak for 'those little pencil lines that separate the different patterns') and find a way to add in/blend together random patterns in such a way that the final result does not suck.
If you would like to read more information on the Diva's weekly challenges, roll on over to that little button in my sidebar and you'll see one that looks appropriate. I'm not going to tell you which button it is. Think of it as a little sidebar-button scavenger hunt. Now, go! Go forth and discover!