In a Pint glass add plenty of ice. Add the Dark Rum and the Pernod. Almost to the top with Lemonade then colour with the blackcurrent.
If you want it sweeter add more Blackcurrent.
If you want it stronger add another shot of Dark Rum or Pernod, or be really wicked and add both.
Drink it through a straw and it will hit you like a train, sorry - A Pink Elephant!