code: function Time() {
      this._start = 0;
      this._now = 0;
      this._prev = 0;
      this._delta = 0;
      this._deltaSeconds = 0;
      this._elapsedSeconds = 0;
      this._frames = -1;
      this._stopped = false;
  
      this._fpsUpdateFrequency = 1000; //1s
      this._fpsFrames = 0;
      this._fpsTime = 0;
      this._fps = 0;
  }
docs: Time class
  @class