How to cut continuous bias strips from a square: Cut on diagonal, Seam two triangles flat, press, and mark cutlines. Sew into tube with an offset the width of one strip, cut all strips (with scissors). BEWARE of loose-woven discount quilting cottons, they're prone to stretch out of shape lines won't meet at the last seam. Use spray starch, true up the diagonal cuts before you sew that seam. Use a sharp pencil to mark, after the last seam adjust any lines that don't meet.