I'm sure you've seen them. You sew a whole jelly roll end to end and then grab the two ends and sew them lengthwise. They're kinda boring. Just a buncha strips sewn together. The only variations are sewing the strips together with bias seams or straight seams and maybe adding a square between the strips when you use the straight seams.
But I had a black and white jelly roll.
So I jazzed it up.