Prepare cake mix according to package directions, adding vanilla extract to the batter.
Divide batter in half, tint one batch yellow with 1/3 teaspoon yellow food coloring, tint second batch with 1/3 teaspoon orange food coloring. Fill each paper-lined muffin cup 1/3 full with yellow batter. Gently add orange batter on top of yellow batter, filling each cup 2/3 cup full.
Bake as directed on package for cupcakes.
Frost cupcakes, decorate with colored sugar and candy corn.