I made these wallhangings using Karen Combs Quilts of Illusion technique (instructions, fabrics, and templates are available on her website). Each block has a light, medium, and dark side, and the shapes are diamonds, not squares. The blocks can be arranged in many different designs. It is a challenge to find three shades of each color. Karen Combs has fabrics for sale with four shades of one color running the length of the fabric.