Since all my family and friends have been gifted with quilts, I now make mostly charity quilts. I, too, was looking to use up all my 2-1/2" squares. I sorted them into groups of 16 of the same color, made blocks of the 16 and used black sashing in between the blocks. With some of the colors, I made light and dark blocks, e.g., one block of light green squares and one block of dark green squares. By the time I was finished, I had become overly fond of the quilt and just couldn't donate it to charity. I must be honest. It is my all-time favorite of all the quilts I have made which number over 100. Wish I was computer savy enough to post a pic of the quilt, but, alas, it's not going to happen.