You will need to follow the link to actually use this neat tool BUT I thought you might want to see what it looks like :
Random Stripe Generator
I wrote this script to generate random stripe patterns for knitting sweaters, scarves, blankets, etc. It'll give you an idea of what the finished sweater will look like, but it still leaves some unpredictability to the stripe pattern. Try it out by entering your colors and desired stripe widths below:
1. Select your yarn colors (minimum of 2):
2. Which stripe widths should be allowed (ie, 1 row wide, 2 rows wide)?
3. Approximately how many rows total would you like generated (max. 1000)?