Preheat oven to 350°F. Grease and flour two 9-inch round cake pans.

Mix flour and sugar in a bowl. Add melted butter, eggs, and vanilla. Beat until smooth.

Divide batter into four equal parts. Color each part with food coloring to create different shades.

Pour different colored batters into the prepared pans in layers, creating stripes.

Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.

Allow cakes to cool completely, then layer with buttercream frosting.