Setting Gear (freeCodeCamp challenge)

bike_gear.txt

/* 
Bike constructor with a private property called "gear" 
and two public methods called "getGear" and "setGear" 
to get and set that value.
*/

var Bike = function() {

 var gear;
    
  this.setGear = function(change) {
    gear = change;
  };
    
  this.getGear = function() {
   return gear;
  };
};

var myCar = new Car();

var myBike = new Bike();