Now you are ready to start sewing. Place one backing block down with a center strip centered across the middle,from corner to corner. Place your second strip face down on the center strip, matching edges and sew with a 1/4" seam. Fold the strip away from the center strip and finger press at the seam. Now choose your second strip and place face down on the first attached strip, making sure bottom strip lays flat and sew in place. Continue adding strips until first half of backing is covered, trimming excess from the long ends of the strips as you go.
Then rotate the block and do the same on the opposite side. If you want the effect I have in my quilt, you will sew dark strips to one side and light strips to the other.
Turn the block over when finished and using sissors, trim the excess from the strips, making them even with the back.