My Birthday Cake

I'm no party girl but my best friend came to visit to celebrate my birthday with me and my boyfriend. I decided to have a go at a chocolate and vanilla marble cake with the intention of then also marbling the icing too. The cake was beautiful and I piped icing on with the original idea of swirling the icing to give a marbling effect. However, as with so many things in life, some things are just best left as they are, so this was the finished cake: