Scrappy log cabin quilt block

8 1/2 inch quilt block Center square is 2 1/2 inches Strips are 1 1/2 inches wide First row Light side 2 1/2 and 3 1/2 inch strip Colored 3 1/2 and 4 1/2 inch strip Second row Light side 4 1/2 and 5 1/2 inch strip Colored 5 1/2 and 6 1/2 inch strip Third row Light side 6 1/2 and 7 1/2 inch strip Colored 7 1/2 and 8 1/2 inch strip