The basic pattern is a solid square (1 dc in each dc on the sides, [2 dc, ch 2, 2 dc] in the corner spaces), only in two colors. What you're going to do is work with one yarn at a time, and carry the yarn you're not working with by crocheting over it. So, work the first corner as normal with color A. When you get to the second corner, work the first two dcs, drop the working yarn to the front, chain two with color B (the first chain will be in color A, the second in color B), then work the last two dcs with color B. Now work with color B until you get to the fourth corner, and repeat the directions given for the second corner (with A and B reversed). Make sense?
