I used the equivalent of the whole 40 strips in a jelly roll, however I had some scraps and strips from FQs. The trick to making the top to this quilt is to sew the short ends of all the 40 strips together into one long ribbon, cut about 10-15 inches off of one end, and then sew one edge of the long ribbon together, cutting the fold at the end to give you 2 rows. Repeat for 4 rows. Repeat for 8 rows. Repat for 16 rows. And I stopped at 32 rows. Super quick process... well comparatively :) The randomness of where the different strips end up is part of the fun!