The biblical flood, in Swift

Flood.swift

let 🌍 = "🐶🐺🐱🐭🐹🐰🐸🐯🐨🐻🐷🐽🐮🐗🐵🐒🐴🐑🐘🐼🐧🐦🐤🐥🐣🐔🐍🐢🐛🐝🐜🐞🐌🐙🐚🐠🐟🐬🐳🐋🐄🐏🐀🐃🐅🐇🐉🐎🐐🐓🐕🐖🐁🐂🐲🐡🐊🐫🐪🐆🐈🐩"

var 🚢: String[] = []

for 💕 in 🌍 {
    switch 💕 {
        case "🐑", "🐏", "🐐", "🐂":
            for 🛁 in 1...7 {
                 🚢.append(💕 + 💕)
            }
        default:
            🚢.append(💕 + 💕)
    }
}

🚢

func 🌊(🚢: String[]) -> String {
    var 💩 = ""
    for 🙀🙉😱 in 🚢 {
        💩 += "💩"
    }
    return 💩
}

for 🌞🌝 in 1...40 {
    🌊(🚢)
}

let 🌈 = true

Working version for Swift 2:
https://gist.github.com/skywinder/4688531c72897234dea3