Okay I'm not proud of that thumbnail, but I didn't know what to do for stripes and I don't have a lot of time...
Anywho, If you don't know how to create seamless patterns check out bittbox's post on diagonal lines. Also see these old ones on Veerle Link and Link. I create several vector patterns a week for personal use, and after you do a bunch you become very speedy. This is a very important skill to master!!!