Let your cupcakes cool right down before icing. Divide the icing into 3 separate bowls, each bowl in the microwave for about 7 seconds. This will make the icing easier to drizzle. Now in one bowl put the black food dye in and stir. Then drizzle all over the cakes. Repeat with purple. But for orange, get the bowl with the icing and add half of the zest of a orange and some juice, then add the orange food dye. Drizzle over and Enjoy! Happy Halloween!