Mucking about with blue cake

We're having a cake sale and competition at work tomorrow with an artwork theme to raise some money for Sport relief. I made this blue cake with a Damien Hirst idea in mind. The two rectangles will have a bisected chocolate rabbit in them and the whole cake will then be placed in a see through plastic box to give 'Easter bunny divided'!

The cake, though bright blue, was actually very lemony and tasted rather nice.