Microwave semi sweet chocolate and white chocolate in separate medium bowls on high for 2 minutes or til almost melted stirring halfway through heating time. Stir until completely melted. Stir 1/2 the peppermint candies into each bowl. Alternately spoon melted chocolate onto wax paper lined cookie sheet. Swirl chocolate together with knife to marbleize. Refrigerate 1 hour or until firm. Makes about 1 pound.