Take lots of ice in a cocktail shaker and pour all ingredients into it. Now shake it well for 30 secs or so.
30 ml Bacardi Carta Blanco, 20 ml Bacardi Carta Negra, 10 ml Cointreau liqueur, 5 ml lime juice, 30 ml Pineapple Juice, 30 ml Orange Juice, 1 dash grenadine, Lots of ice