How clever are developers

index.js

// Get the kettle
var kettle = Kettle.getKettle();

// Check we have enough water
while (kettle.cupsOfWater() < 1) {
    // No - add water until there's enough
    kettle.addWater();
}

// Boil the kettle
kettle.boil()
    .on('boiled', function () {

    // Kettle boiled - now make the tea
    var cuppa = new Tea();
    
    // Is sugar required?
    if (numberOfSugars > 0) {
        cuppa.addSugar(numberOfSugars);
    }
    
    // Is milk required?
    if (milkRequired) {
        cuppa.addMilk();
    }
    
    // Finished making - drink your tea
    cuppa.drink();

});