Make deviled eggs like you normally would. Then use black or green olives. Cut them to make circles (like eyes). Put a pimento in the center. Then, with red food coloring and a tooth pick, put the "blood" on the white part of the egg.
We made six dozen of these eggs once for a picnic. All were eaten! It's perfect for a Halloween party. If you don't want to go through the hassle of the squiggly lines, just put paprika on them like you would with normal deviled eggs, but make sure you get it on the whites! Also, if you don't like pimento, you could use some other food you do like Jay