Line 15x10x1-inch baking pan with foil so foil extends over ends of pan. Place each color candy melts in separate small resealable freezer plastic bag. Microwave each bag on HIGH for 90 seconds, squeezing bag to mix after each 30-second interval. If not completely melted, microwave each bag for an additional 30 seconds or until completely melted.
Cut off small corner of each bag. Drizzle warm candy into foil-lined pan; create swirls and designs in warm candy with fingers, spoons or flat wooden sticks with round ends. When desired design is achieved, tap pan until candy is uniform thickness. Sprinkle peppermint candy over top. Place pan in freezer for about 4 minutes or until completely set.
Remove candy from pan by lifting foil; remove foil. Break candy into 2-inch random pieces.