As you are making a rag quilt, you are putting the backing on at the same time. You put the two squares wrong sides together and sew, leaving the edges exposed on one side. Some people put batting between, but if you want a lighter weight blanket, you can do it without the batting. If you only use one layer of fabric, you will see the wrong side of the fabric on one side. When you are finished, you don't have to quilt it. Easy and done!!!