This one was a lot of fun to do!
It took three or four evenings of work to complete. I had no reference for this one, which made it all the more challenging to do. I used oil paint for this, and trust me, it was a pain to keep the bright yellow as, well, bright as I have.
I came up with this idea after wanting to do something more pop-art ish. I just sort of thought about it for a while, and determined I wanted to do something gridded with complimentary colors in boxes. I'm also incapable of drawing straight lines, and I had no rulers, so my grid is a little warped.
Oil on 14 x 18 canvas.