Bike Race OOP JS

bikeRaceOOP.js

var Bike = (function () {

  var _bike;

  _bike = function(opts) {
    this.name = opts.name;
    this.topSpeed = opts.topSpeed;
    this.location = 0;
    this.speed = 0;
  };

  _bike.prototype.toString = function() {
    return this.name + " - " + this.location + " - " + this.speed;
  };

  _bike.prototype.accelerate = function() {
    if (this.speed < this.topSpeed){
      this.speed = this.speed + 1;
    }
  };

  _bike.prototype.start = function() {
    this.accelerate();
  };

  _bike.prototype.update = function() {
    // something random?
    this.location = this.location + (this.speed * Math.random());
  };

  return _bike;
})();

var Race = (function () {

  var _race;

  _race = function(opts) {
    this.racers = opts.racers;
    this.start = 0;
    this.finish = opts.finish || 100;
    this.active = false;
    this.winner = "";
  };

  _race.prototype.start = function() {
    this.active = true;
    for (var i = 0 ; i < this.racers.length ; i++){
      var currentRacer;
      currentRacer = this.racers[i];
      currentRacer.start();
      currentRacer.update();
    }
  };

  _race.prototype.beginRace = function() {
    this.start();
    while (this.active){
      for (var i = 0 ; i < this.racers.length ; i++){
        var current_racer;
        currentRacer = this.racers[i];
        if (currentRacer.location >= this.finish){
          this.winner = currentRacer;
          this.stop();
          break;
        }
        currentRacer.update();
      }
    }
  };

  _race.prototype.stop = function() {
    this.active = false;
    console.log("STOP THE RACE! " + this.winner.name + " WON!!!")

    for (var i = 0 ; i < this.racers.length ; i++){
      var current_racer;
      currentRacer = this.racers[i];
      console.log(currentRacer);
    }
  };

  return _race;
})();

var jeff = new Bike({name: "Jeff", topSpeed: 15});
var joel = new Bike({name: "Joel", topSpeed: 12});
var bekk = new Bike({name: "Bekk", topSpeed: 18});

var race = new Race({racers: [jeff, joel, bekk], finish: 100});
race.beginRace();