I marked the outline of each shape using a medium black felt pen and identified the colour on each one.
I sprayed a piece of calico fabric with temporary fabric adhesive and laid out and pinned the pieces on it. Next, the panel was mounted on wadding and backing and pinned through all three layers. Finally, each shape was outlined with a wide zig-zag stitch which had the effect of anchoring the pattern together and at the same time quilting it. A border was added to make a good-sized cushion.