Prototypical Inheritance Pattern

dog.js

var Dog = function(name){
  var name = name,

  numberOfBarks = function(volume){
    for(var i = 10; volume >= i; i--){
      if(volume % 3 === 0){
        return volume / 3;
      }
    }
  },

  barkWithVolume = function(volume){
    var barks = numberOfBarks(volume),
        barkArray = [];

    for(var i = 0; i < barks; i++){
      barkArray.push('Bark');
    }
    
    return (name + ': ' + barkArray.join(' ') + '!!!');
  };

  return {
    name: name,
    bark: barkWithVolume
  }
};

var sparky = new Dog('Sparky'); // { name: 'Sparky', bark: function(volume){} }

sparky.bark(10);   // "Sparky: Bark Bark Bark!!!"