Step 3: Add chunks & set
I was careful about color distribution, but you could skip the anal-retentive nonsense and dump your candy on there all at once. Just be sure to press the candy in so it sticks to the chocolate.
If it's a warm day, put the chocolate in the fridge to set; on a cool day, it should set up quickly right there on your counter top.
Optional bonus step:
Drizzle the top with a contrasting color of chocolate. I used dark chocolate (leftover from the vegan experiment), but you could also tint some more white chocolate in another disgusting color. I'm thinking purple could have gone over well here.