Prepare a baking sheet with parchment paper.
Melt chocolates in microwave in 20 second intervals until completely melted.
Spread milk chocolate evenly in the pan.
Place orange chocolate in a pipping bag with the end cut off and drizzle horizontal lines across the milk chocolate.
Using a knife, make horizontal and vertical lines in the chocolates to make a swirl effect.
Add decorative sprinkles.
Place chocolate in fridge for at least one hour. Once it is set up, break into pieces and serve.