Adding muzzle flash to the gun....

I Want to add a muzzle flash to the gun the gun automatically fires if the gun aims on enemy......

 #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);
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      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;
     }

thanks in advance.........I am not using particle renderer ...i am using A simple plane`