Divide vanilla frosting among 3 bowls
. Tint one blue, one red, and one yellow. Place blue frosting in a piping bag fitted with a ribbon tip, and place red and yellow frostings in bags fitted with plain tips. Pipe blue trim around entire upper edge of ship, then pipe red frosting underneath the blue. Cut licorice into 20 lengths. Insert licorice pieces into sides of ship for cannons. Pipe half circles of yellow frosting over cannons. Pipe yellow windows across the stern and around the back of ship. Pipe yellow curlicue designs on bow of ship and decorate with red dots of frosting.