Use four screws to mark the four corners of a rectangle in the center of a painted piece of plywood. Wrap cut pieces of wire coat hanger around the screws to form the sides of the rectangle. Then wrap pieces of twine around the wire to form the Roman numerals of the clock, securing each piece of tied-off twine at the edge of the board with a nail. Finally, add a clock mechanism in the back, and you're done. An easy, DIY clock for any room.