Prepare a baking sheet with parchment paper. Melt 10 ounces of chocolate melts in the microwave in a microwave-safe bowl at 20 or 30 second intervals until completely melted, make sure to stir in between each interval to properly temper your chocolate.
If you are adding a colorful swirl to the chocolate bark, take about 3-4 tablespoons of your melted chocolate into another container and add some type of oil based food color to color your candy melts. Do not use water-based as this will seize up your chocolate. The only way to maybe salvage it is to add some vegetable or canola oil to it, but not guaranteed. Use something like Wilton Candy Colors or something similar. It's concentrated oil-based colors that blend easily with candy melts. Or to simplify, just buy some red or pink colored candy melt wafers, melt them, then swirl them in. Set aside to make the chocolate bark.
Pour the chocolate onto the parchment paper and spread it out in an even layer using the back of a spoon or offset spatula.
Add the colored chocolate by pouring it randomly over the chocolate.
Using a knife, toothpick or lollipop stick, make swirling motions all over the pan to combine chocolates together.
While the chocolate is still melted, add candies and decorative sprinkles on top, so they stick to your bark.
Place chocolate in fridge for at least one hour. Once it is set up, break into pieces and serve.