Hi , I finally figured it out. The 4 log cabin blocks that surround the black square are rectangular in shape (leave 1 strip off one side to get this shape). The black center is a square the size of the width of the strip . Then you join them using the technique LindaG has listed in the previous reply. Math is a wonderful thing if you can apply the numbers to the formulas. Cutting out paper squares and strips and then cutting them out repeatedly also helps!! :lol: :lol: :lol: Anne