Line a large baking sheet with parchment paper.
Add 2 cups of semi-sweet chocolate with 2 teaspoons of coconut oil to a microwave-safe bowl.
Microwave in 30-second intervals, stirring until smooth.
Pour onto the baking sheet and spread into an even ¼-inch layer.
In a clean bowl, melt the white chocolate with ½ teaspoon of coconut oil.
Drizzle over the semi-sweet base and swirl with a knife for a marbled effect.
Sprinkle pretzels, candy corn, Oreos, eyeballs, and sprinkles evenly on top.
Press down gently to stick.
Refrigerate for 20–30 minutes, or until fully set.
Lift the bark from the pan and break into rustic shards.