If you want to make red and blue to swirl into the white bark take about 12-15 out for each color, leave the rest white.
Put bowl with white candy melts into microwave and follow directions on back of bag to melt until smooth.
If you want to coat bugles to make horns white dip each one into the white chocolate until coated. Set on a piece of parchment to dry. When wet you could sprinkle with sprinkles so they stick.
Pour melted white chocolate on to sheet lined with parchment and spread out. Microwave other bowls with white candy melts with a bit of colored gel inside, or use already colored candy melts until smooth.
Drizzle over white melts, use a knife to drag thru so it creates a squiggle thru it. Do the same with any other colors you want to incorporate.
Set regular or coated bugles "horns" here and there on your bark, as well as the candy eyes 2 next to one another. Allow to cool on countertop or fridge until hard.