In 4 microwave safe bowl place the 4 different colors of chocolate microwave in 30 second intervals until melted and smooth.

On a tray or baking sheet lined with parchment paper place dollops of the colors all over the lined sheet pan and swirl them together.

Separate the sandwich cookies and place 2 cream side up next to each other to create eyes.

Do the same with the smaller cookies and add M&Ms to make the pupils.

Add as many sets of eyes as you like.

Sprinkle the Halloween sprinkles over the bark.

Let the bark set either on the counter or if you want it to set quickly in the fridge for about 20 minutes.

Break into pieces and serve!