On to the borders
13. Cut your white 2 1/2" squares into triangles
sorry I didn't take a pic of this
14. Sew the 3 1/4" x 4" dark strip to one short side of the triangle.
15. Trim to 3/4"
16. Sew the 3 3/4" x 4" dark strip to the other short side
17. Trim to 3/4"