var scrollSpeed = 0.1;
  
  private var initialColor : Color;
  
  private var flicker = 0.0;
  
  function Start()
  {
          initialColor = renderer.material.GetColor("_TintColor");
  }
  
  function Update () 
  {   
          var offset = Time.time * scrollSpeed;
      renderer.material.SetTextureOffset ("_Interlace", Vector2(0.0, offset));
      
      var scaleY = Mathf.Sin (Time.time) * 0.2;
      renderer.material.SetTextureScale ("_Interlace", Vector2(2.0,scaleY  + 1.6));
      
      if (Random.value >= 0.7)
          {
                  flicker = Random.value + 0.2;
                  
                  light.intensity = flicker;
                  
                  renderer.material.SetColor ("_TintColor", Color(initialColor.r * flicker, initialColor.g * flicker, initialColor.b * flicker));
          }
          
          audio.pitch = scaleY + 1.0;        
  }