Layer the applique block, batting, and muslin or light-colored fabric square. Quilt by hand or by machine. I machine quilted the pillow by free motion stitching around the kitty. Then I stitched continuous loops in the background. If you use a printed fabric for the setting triangles, you can quilt the design lines in the fabric with free-motion stitching.
Machine stitch the edge.
Backstitch where the rectangles end to strengthen these stress points. Turn the pillow right side out and insert the pillow fom. For a different look, add piping or a ruffle to the edge of the pillow. Upside-Down Applique Choose the fabrics for the applique pieces and the background. On the rough side of the iron-on stabilizer, with a permanent pen or a pencil, trace the complete design.