1/4 oz of Malibu coconut rum (or Coconut Rum)
1/4 oz of blue curacao liqueur
1/4 oz of Creme de menthe (or Mint liqueur)
1/4 oz of Bailey's Irish Cream (or Irish Cream)
Very similar to a normal Agua. Roughly put the ingredients together in similar proportions into a shot glass, making sure you finish with the Bailey's - which should sink to the bottom then swirl through the blue-green.