Adding muzzle flash to the unity

   #pragma strict
  var Rounds : int;
  var Ammo : int;
  var Reloading : boolean;
  var MaxAmmo : int = 20;
  var theDammage = 100;
  var delay = 0.1;
  var timestamp = 0.0;
  var ReloadTime = 1.8;
  private var reloading : boolean = false;
   function Start()
  {
  GetComponent.<Animation>().Play("Idle",PlayMode.StopAll);
     }
  function Update ()
   {
  var hit : RaycastHit;
  var ray : Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5, 0));
  if(Rounds == 0 && Ammo == 0  )
  {
  return;
  }
  if (Ammo <= 0 && Rounds >= 0 )
  {
  Reloading = true;
  GetComponent.<Animation>().Play("Reload",PlayMode.StopAll);
  Reload();
  }
  else
  {
  if (timestamp <= Time.time && Physics.Raycast (ray, hit, 10) && Reloading == false)
  {
   timestamp = Time.time + delay;
   if(hit.collider.gameObject.tag == "Dobj")
   {
   Ammo--;
   GetComponent.<Animation>().Play("Fire",PlayMode.StopAll);
   GetComponent.<AudioSource>().Play();
   hit.transform.SendMessage("ApplyDammage", theDammage, SendMessageOptions.DontRequireReceiver);
  }
  }
  }
  }
  function Reload()
  {
  yield WaitForSeconds (1);
  if(Ammo == 0 && !Reloading)
  {
  Rounds --;
  Reloading = true;
  Ammo = MaxAmmo;
  }
  Reloading = false;
 }

I Want to add a muzzle flash to the gun the gun automatically fires if the gun aims on enemy......thanks in advance.........I am not using particle renderer ...i am using A simple plane