Working on a black and white quilted piece

Working on a quilted homage to Bridget Riley's early 1960's paintings, but need to take a break, for my poor back, which aches from working on the sewing machine.  I see now why I work by hand, much easier on me, seems counter intuitive, but that is where it is.  Hopefully I will have something to show soon.  Still working on the Civil War era quilt as well, love this time travel.