Open the strips, but do not press them open yet.
With right sides together, lay the two strip sets on top of each other. Making sure that once they are sewn, they reflect the way you want your block to come out.
Take your four patch sets to the sewing machine and sew a 1/4" seam allowance.
Take a peak to make sure your points match at the center, and those sure do!!
Like so...press with iron to set.
Square your block up to cut size, in this case 2 1/2" which once sewn will finish 2".