If you are machine quilting, you could make tissue paper patterns to stitch through. (There is a product called Golden Thread paper that you can stitch through also.) With tissue paper, cut several squares the size of your block, draw the pattern on one square, stack up your squares and pin the corners, stitch over the drawn pattern with the machine needle without thread, take the pins out of the squares and you will have several copies to pin on the sandwich and stitch the pattern. Carefully tear away the tissue when finished.