Eggs are broken down with the sugar, then add to the mixture, vanilla, baking powder, 6 tbsp water, the oil and stir again with a mixer. Add flour, stir again and pour into rectangular or square pan, the bottom of which is pre-coated with sunflower oil and covered with baking paper. In separate bowls put various paints and a little of the mixture - mix and put back into the tray. To become a nice decoration mixed paints the surface with the tip of a knife. The base and bake when ready subtract on damp cheesecloth as baking paper is removed. Spread with jam of your choice and using the cloth rolled up.