Line two muffin tins with paper liners. Prepare a batch of vanilla cake mix batter according to the package directions, then evenly divide it between two bowls. Stir 8 drops of yellow food coloring into one of the bowls. Stir 34 drops of yellow and
31 drops of red food coloring (a scant 1/2 teaspoon each) into the other bowl. Evenly distribute the yellow batter among the wells (about a heaping tablespoon per cup), then top with a layer of orange batter, making sure to cover the yellow layer completely. Bake the cupcakes according to the package directions and let them cool. Just before serving, use a mixer set on medium to whip heavy cream with sugar and vanilla extract until stiff. Use a pastry bag with a star tip or a sandwich bag with a corner snipped off to pipe a dollop of whipped cream onto each cupcake, then add a candy corn.