Line a baking sheet with parchment paper and cut the white chocolate into small pieces.
To melt the white chocolate in the microwave, simply place the cut white chocolate into a microwave-safe bowl and heat the chocolate in 30-seconds intervals, stirring after each interval until it's completely melted and smooth. Be careful not to overheat, as white chocolate can scorch easily. Stir well with the spatula after each interval of heating the chocolate.
Into three separate small bowls, divide 3 tablespoons of melted white chocolate into the bowl. The remaining white chocolate, set aside. Add five drops of Flo-Coat Candy Coating and one drop of coloured food colouring to each bowl with the white chocolate. Stir the colours to combine.
Pour the remaining melted white chocolate onto a baking sheet lined with parchment paper. Using an offset spatula, spread the chocolate into the corners of the baking sheet, until the thickness is 1/8".
Drizzle in circular motion the coloured chocolates on top. With a toothpick, create a spider web. Place the Halloween eye candies on the top of the white chocolate and sprinkle with your favourite Halloween sprinkles.
Transfer the baking sheet with white chocolate bark to the refrigerator to set, for 2 hours.
Remove the chocolate bark from the refrigerator once it's firm and set. Break the bark into irregular pieces with your hands or large knife. Enjoy!