This came as a total brainwave. You got to execute this really quickly, so I would suggest that you take a good read through this whole recipe first before you start on it. Its a lot of work, but a lot of fun as well!
45ml Midori
4 ice cubes
Blend it until you get a nice smoothie consistency, then pour into a tall glas.
45ml Bols Blue
4 ice cubes
Blend it again, but now instead of pouring it into the tall glass, tilt the glass slightly, to around 45 degrees, and slowly pour the blue smoothie mixture into the glass. You should get your second layer.
45ml Bols Lychee
4 ice cubes. Again, blend this mixture till you get a nice white smoothie, and pour it into the glass the same way as the Bols Blue.
Take About 20ml of Grenadine Syrup, place it in a shot glass, and serve. The drinker has the honour of pouring in the Grenadine Syrup if he wants it, and then he will stir the drink. Best consumed with a straw