Do you mean to strip piece the 9 Patch blocks? That is a very simple thing that you can do yourself but I am sure there are tutorials on it on the net. All you do is cut your strips the size you want for the 9 patches plus seam allowances. You then sew 2 different stratas, one with the dark colour on each side of the center light fabric and one the second strata you reverse the colours. Once you have the long stratas sewn together you sub-cut the sections for your blocks and sew the blocks back together for the 9 Patch.