It's a bit rough round the edges but it's only a tiny one. I think it's the best one I've done so far. I've stumbled on a way of making it look like refracted light is coming through the grids although I could do with practising it on a larger scale. Acrylic on canvas
A wee test I did in my sketchbook just to see how the outlining might work. Emulsion and water soluble crayons on paper.