Draw your designs on the canvases uses a hot glue gun.
Remove all the glue strings, using a toothpick or small pair of scissors for harder to reach areas.
Paint each canvas a different color, going completely over the glue design: Light Yellow, Light Green, Light Pink, and Robin’s Egg Blue.
Use a dry brush technique to add some White to the canvases, paying close attention to the raised glue designs.
When everything has dried, apply a coat of matte varnish.