public Tracker(DifferentialPilot thePilot, LightSensor leftEye , LightSensor  rightEye)
  {
    pilot = thePilot;
    pilot.setTravelSpeed(12);
    pilot.setRotateSpeed(180);
    pilot.setAcceleration(3000);
    this.leftEye = leftEye;
    this.leftEye.setFloodlight(true);
    this.rightEye = rightEye;
    this.rightEye.setFloodlight(true);
  }