Despite multiple searches, I couldn't find a pattern for a one jelly roll bargello quilt. I was curious to see if it was possible, so I just went ahead and put one together. The end result is not ideal - the waves are a little short because there are only 2 strip sets of 20 colours each. A more square quilt made from 3 strip sets would have a nicer overall effect. But, it isn't terrible and it was quick and easy. (Photo is a little overexposed - it's actually all blues)