When the mirror glaze is cooled to 33-35°C, take the cake out of the freezer and the mould. Place a baking pan or a bowl upside down (something to put the cake on) on a bigger baking sheet, or something that will catch the leftover glaze. Place the cake, sponge side down, on the bowl or a baking pan. Now pour the white mirror glaze over the cake, then some blue and some pink. Gently scrape the top with a palette knife to blend the colors and make the top straight. The glaze will start setting pretty fast, so when it does, don't try to correct, or touch anything. Leave the leftover glaze to drip down, then remove the drips at the bottom with a knife, or scissors.