Decorate cake. Using ruler and toothpick, mark vertical lines every ¾ in. around sides of cake. Prepare six decorating bags with couplers. Fill separately with blue, dark teal, yellow, coral, orange and pink icing.
Alternating colors and tips, pipe dots, stars and lines randomly along vertical lines (we used tip 14 for the yellow and orange stars and tip 16 for the other stars, but you can do whatever you’d like!).