private var litAmount = 0.00;
  
  function Start () {
  
          var playerController : ThirdPersonController = GetComponent(ThirdPersonController);
          
          // The script ensures an AudioSource component is always attached.
          
          // First, we make sure the AudioSource component is initialized correctly:
          audio.loop = false;
          audio.Stop();
          
          
          // Init the particles to not emit and switch off the spotlights:
          var particles : Component[] = GetComponentsInChildren(ParticleEmitter);
          var childLight : Light = GetComponentInChildren(Light);
          
          for (var p : ParticleEmitter in particles)
          {
                  p.emit = false;
          }
          childLight.enabled = false;
  
          // Once every frame  update particle emission and lights
          while (true)
          {
                  var isFlying = playerController.IsJumping();
                                  
                  // handle thruster sound effect
                  if (isFlying)
                  {
                          if (!audio.isPlaying)
                          {
                                  audio.Play();
                          }
                  }
                  else
                  {
                          audio.Stop();
                  }
                  
                  
                  for (var p : ParticleEmitter in particles)
                  {
                          p.emit = isFlying;
                  }
                  
                  if(isFlying)
                          litAmount = Mathf.Clamp01(litAmount + Time.deltaTime * 2);
                  else
                          litAmount = Mathf.Clamp01(litAmount - Time.deltaTime * 2);
                  childLight.enabled = isFlying;
                  childLight.intensity = litAmount;
                                          
                  yield;
          }
  }
  
  @script RequireComponent(AudioSource)