If you know the brand and pattern info, you might find the repeat on the web. You need to know that, to know how much fabric to order, as you need the # repeats to do the 4PP or OBW or SAW. It's good to have extra fabric, so you can include some of the "virgin" fabric in your quilt as a reference. That might be a small piece .... or might be a border, so quantities would vary! You'll notice that for mine, my backing is the virgin fabric.
Another thing, 4PP will not help you practice triangles, as it's all squares. Unless you plan to do it as a square in a square? OBW is all triangles.
Good Luck! and let us know what you decide.