gistfile1.js

bmw = { color: 'blue', make: 'BMW' };
vw = { color: 'green', make: 'VW' };

function logCar(car){
  console.log("I'm a " + car.color + " " + car.make + "!");
}

logCar(bmw);

function Car(info){
  this.color = info.color;
  this.make = info.make;

  this.log = function(){
    console.log("I'm a " + this.color + " " + this.make + "!");
  }
}

c = new Car(vw);
c.log();