Firstly level off each layer of sponge.
Make the first layer of sponge and place on your cake board or serving plate.
Take one bowl of buttercream this will be used to fill and crumb coat your cake.
Take a third of the buttercream out of bowl and place in a different bowl, add the Red Colour Gel and mix through until the colour is evenly distributed.
Place the red buttercream in a piping bag and place half of the white buttercream in another piping bag.
Cut the end of each piping bag to create a 1 cm hole.
Starting in the centre of the cake layer pipe a small ring of red buttercream then pipe a ring of white buttercream around the red ring.
Repeat this alternating colours until you reach the outside edge of the cake.
Place the next layer of sponge on top and repeat the piping process.