Step 1: Materials and Tools
Large jar with lid
Craft foam or card stock, small Halloween decorations
Optional: LED tealight
Black paint and coloured markers
Step 2: Ground
Make a hole in the centre of the foam large enough to fit the part of the clock mechanism that holds the hands.
Step 3: Hands
Bend the hands up so that they fit inside the jar and are angled far enough apart that they don't interfere with the rotation (or each other).
The hands on top need to be shorter then the one beneath, (so in this case the hour hand is longer than the others - going against convention.)
Step 4: Ghost
Cut out the shape and draw in the eyes and mouth.
Trim the arm of the second hand so that only the horizontal portion remains.
I found some clear plastic (PET) packaging that had a bend and cut a piece 2 inches long and ~1/4 inches wide and includes part of the bend (see image 4 and 5 above).
Glue the straight end to the ghost and the bent end to the second hand.