4 Patch Posies is easier and takes less fabric than OBW or Stack & Whack. It is a good one to start on and gives you amazing square designs. You need a fabric that has four repeats in it and depending on how far apart they are, it will determine how many and how large your finished squares will be. One of the nice features of the squares is that you have 4 possible ways(4 different corners) to put a block together.