Using red cookie icing, outline 3 red triangles on rooftop, following lines scored earlier. Outline corresponding rectangular scored lines below roof triangles. Avoid filling in middle red stripe completely, as it will be outlined and filled with another color. Fill in stripes with red icing (do not over-fill or icing will overflow outlines). Use toothpick to move icing around to close any gaps. Outline center scored triangle with black cookie icing. Fill in outline with black icing as before with red icing. Outline all scored lines with black cookie icing.