Take your 61 Dark 1 1/2 inch Strips and your 61 Light 1 1/2 Inch Strips and sew them together using a 1/4 inch seam. I tried to time me, to see how long it takes - but I am one of those that sew for 15 minutes then have to go do a chore, and then come back. And I lost track of time.
Press them. I always press them to one side, not open. But that is your choice.
And then you have this lovely pile of strip sets.
Will this keep you busy for a week?