var secondsPerVerse = 0.001;

function bottles(n, capitalize) {
  return (capitalize ? english(n).capitalize() : english(n)) + " " + maybeAddAnS("bottle", n) + " of beer";
}

function drinkAlotOfBeer(numberOfBottles, actionToPerformOnVerse, depth) {

  var stillDrinkingBeer = true;
  var justReplenishedSupply = false;
  if (!depth) depth = 0;
  depth++;

  var takeOneDownAndPassItAround = function() {
    numberOfBottles--;
  }

  var thereIsNoMoreBeer = function() {
    return !(numberOfBottles > 0);
  }

  var replenishBeerSupply = function() {
    numberOfBottles = depth - 1;
    justReplenishedSupply = true;
  }

  var stopDrinkingBeer = function() {
    stillDrinkingBeer = false;
  }

  var verse = bottles(numberOfBottles, true) + " on the wall,\n" + 
              bottles(numberOfBottles) + "!\n";
          
  if (thereIsNoMoreBeer()) {
    verse += "Go to the store, buy some more,\n";
    replenishBeerSupply();
    stopDrinkingBeer();
  } else {
    verse += "Take " + (numberOfBottles == 1 ? "it" : "one") + " down, pass it around,\n";
    takeOneDownAndPassItAround();
  }

  verse += bottles(numberOfBottles) + " on the wall" + (justReplenishedSupply ? "!" : ".");

  if (stillDrinkingBeer) {
    return actionToPerformOnVerse(verse, [drinkAlotOfBeer, numberOfBottles, actionToPerfor