Spray paint the wood blocks, each with one of the spray paint colors. Let dry.
Apply wax to the edges of the blocks with the candle. Rub on all edges.
Apply contrasting paint top coats. Paint the white block with orange, the black block with white, and the orange block with black. Let dry.
Sand away some of the paint on the edges (where wax was applied) to reveal the paint beneath.
Cut the Halloween paper down to 3 1/4 squares - you'll need six pieces per block.
Apply a layer of Mod Podge to one side of the block. Smooth the paper down and wipe away excess Mod Podge. Let dry. Repeat with the remaining sides.
Apply a top coat to the block and let dry. Apply a finishing sealer and let dry (optional).
Repeat with remaining blocks and display.