I did this just for fun. It's only 5 x 7 inches. It SO much more difficult to paint on these small canvases than a large one. Your brushstrokes need to be somewhat more utilitarian than painterly sometimes, to make it work.
This is done in acrylic, a medium that I haven't come to terms with yet, though I REALLY would like to. It's less toxic, however not as luminous as oil..........In my humble opinion anyway.