Using melted white, red , yellow and green candy and painting method from mold label, mold tree candies without sticks. Refrigerate until firm and unmold.
Roll out dough and cut cookies using Santa Hat cutter from set.
Using tip 2, outline house and door in white royal icing. Pipe in tip 2 windows and door window in yellow (smooth with finger dipped in cornstarch). Using tip 2, outline windows, door window and window panes in white; add tip 2 icicles on eaves, chimney top and window sills.
Pipe tip 2 dots on eaves, door frame and window awnings in blue, green, yellow, orange, red and violet.
Attach candy trees and icing decoration with dots of royal icing.