The black is on two separate pieces of MDF, and the lime green is painted on a third. I cut and sanded a slight back-bevel on the black pieces so that, although they are mounted directly to the back piece, they appear to be 'floating' above it. I am happy with this simple piece. You can see it in my eyes.
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UPDATE:
Due to the overwhelming response, it will be more cost effective for Nonphilter, Inc. to simply post the answer to this puzzler in the form of a photo. Inputting all responses would have taken a team of monkeys with scissors and gluesticks, working around the clock, a minimum of a fortnight.
