Paint mini canvases, put together in square, use squeeze bottle to swirl white paint over all of them. (middle three diagonal = same color; two top diagonal=same color; two bottom diagonal=same color; top corner on color, bottom corner one color)
Artwork made from spray painted v silhouette leaves. paint canvas the color you want the leaves. put leaves on canvas and spray paint the background color you want. remove leaves and you will see the color come through.