Stack and tape the three cardboard boxes on top of each other. Make sure they are firmly aligned and stable.
Cut pool noodles to match the box height. Then glue or tape two on each side to mimic gothic pillars.
Attach the foam tombstone to the bottom front box using hot glue. This will serve as the base of your haunted clock.
Cut a circular hole in the top box just large enough to fit your wall clock. Next, insert it snugly so the face sits flush with the cardboard.
Glue the skulls where the columns meet, and secure the bat or gargoyle on top for that creepy, castle-like finish.
Apply two coats of matte black spray paint evenly across the entire structure. Let dry fully.
Once dry, use a dry brush technique with gray and silver paint to highlight edges, cracks, and decorative features for a stone-like appearance.
Insert batteries into the clock and position your haunted masterpiece in a hallway or porch corner for maximum eerie effect.