Melt some of the candy melts by microwaving in 30 second increments, stirring in between each session. Stir to smooth out the chocolate.
Drop about ¼ cup of melted chocolate into the bottoms of each section of the candy mold. Place one Oreo in the center of the holes and press down slightly. Press just enough to secure it, but not enough to have it show on the bottom.
Spread more chocolate on top until the chocolate reaches the top of the mold.
Tap the mold on the counter to release any air bubbles.
Set aside for the candy to fully set, about an hour. Once the candy melt is set, you can remove each cookie from the container.
Melt about 1/2 cup of candy melts as you did before, and add about 1 teaspoon of vegetable oil or coconut oil to thin the chocolate. This will help it drizzle better.
Place the chocolate in a piping bag and cut a small hole at the tip. Drizzle the chocolate back and forth over the candy, making the mummy "strips."
While the chocolate is still wet, place the eyeballs in the top 1/3 of the candy.
Allow the candy to fully set again.