That's how a lot of people years ago made quilts--out of used clothing. That's what I used to make my first quilt. My mother who knew very little about quilting taught me how. We used old scraps of leftover fabris from the dresses she had made. She told me to cut out a square of cardboard for the template and the cut out scraps of fabric and sew together. She knew how to make a quilt but never made one. She did not know how to sew.