Heat oven to 350 degrees F (325 degrees F for dark or nonstick pans). Grease and flour bottom and side of 9-inch round cake pan, or spray with baking spray with flour. Place paper baking cup in each of 12 regular-size muffin cups.

Make cake mix as directed on box, using water, oil and eggs. Spread half of batter in round pan; spoon remaining batter into muffin cups. Bake as directed on box. Cool completely, about 1 hour.

In small bowl, place 1 tablespoon frosting; stir in 2 drops yellow food color. In another small bowl, place 1/4 cup frosting, 3 drops yellow food color and 1 drop red food color; stir to make orange frosting. In third small bowl, place 1/2 cup frosting; stir in 7 drops blue neon food color. To remaining frosting in container, stir in 7 drops green neon food color.

On serving plate, place cake layer with rounded side down. Frost top and side with green frosting. Frost 7 cupcakes with blue frosting, 4 cupcakes with orange frosting and 1 cupcake with yellow frosting. Place 1 blue cupcake on center of green frosted cake. Place remaining blue cupcakes, sides touching, in circle around center cupcake. Place 2 rows of 2 orange cupcakes on top center of blue cupcakes. Place yellow cupcake on top center. Press candies into frosting to decorate. Store loosely covered at room temperature.

Follow High Altitude cake mix directions on box.