text: var Vehicle = function Vehicle(color, model) {
    // Initialization
    this.color = color;
    this.model = model;
  }
  
  // Instance methods
  Vehicle.prototype = {
    go: function go() {
      return "Brrooooom!";
    },
    whoami: function whoami() {
      return "I am a " + this.color + " " + this.model;
    }
  }
  
  var Car = function Car() {};
  Car.prototype = new Vehicle('red', 'Ford');
  Car.prototype.honk = function honk() { return "MOOOOC!" };
  var car = new Car();
  console.log(car.honk());             // MOOOOC!
  console.log(car.go());               // Brrooooom!
  console.log(car.color);              // red
  console.log(car instanceof Car);     // true
  console.log(car instanceof Vehicle); // true