Need help on damage

Hello people...
I'm totally new to programming, and I need help in this script. It is working perfectly, but I want it a shot one death, not several shots to death.
Can someone help me?
Thank you.
following script

#pragma strict
#pragma implicit
#pragma downcast

class SoldierDamageControl extends MonoBehaviour
{
public var life : float;
public var Respawn : Vector3[];
public var Parent : GameObject;
public var hitTexture : Texture2D;
public var blackTexture : Texture2D;
public var Skin : GUISkin;
public var Local : boolean;

public var Soldier : GameObject;
public var Gun : GameObject;

public var KilledStyle : GUIStyle;
public var ActorNr : int;
public var ActorName : String;
public var DisplayKillYou : boolean;

private var hitAlpha : float;
private var blackAlpha : float;
private var AtackerName : String;
private var actorText : GameObject;
private var actorTextOffset : Vector3 = new Vector3(0,1.0f,0);

private var recoverTime : float;

public var hitSounds : AudioClip[];
public var dyingSound : AudioClip;

function SetActorNr(DataActor : Hashtable)
{
ActorNr = DataActor["actornr"];
ActorName = DataActor["actorname"];
if(actorText == null && gameObject.layer != 13)
{
this.actorText = Instantiate(Resources.Load("ActorName"));
this.actorText.name = ActorNr+"";
actorText.transform.localScale = new Vector3(1.4 / 8f, 1.4 / 8f, 1.4 / 8f);
}

}

function Start()
{
SoldierController.dead = false;
hitAlpha = 0.0;
blackAlpha = 0.0;
life = 1.0;
KilledStyle = Skin.GetStyle("Killed");
}

function HitSoldierGranade(hit : String)
{

if(GameManager.receiveDamage)
{
if(!audio.isPlaying)
{
if(life < 0.5 && (Random.Range(0, 100) < 30))
{
audio.clip = dyingSound;
}
else
{
audio.clip = hitSounds[Random.Range(0, hitSounds.length)];
}

audio.Play();
}
if(gameObject.layer != 13)
{

var _usePhoton : GameObject;
_usePhoton = GameObject.Find("_GameManager/UsePhoton");
_usePhoton.SendMessage("DownLifeGranade", ActorNr);

return;
}

life -= 1.0;

recoverTime = (1.0 - life) * 10.0;

if(hit == "Dummy")
{
TrainingStatistics.dummiesHit++;
}
else if(hit == "Turret")
{
TrainingStatistics.turretsHit++;
}

if(life <= 0.0)
{
AtackerName = hit;
SoldierController.dead = true;
DisplayKillYou = true;

}

}
}




function HitSoldier(hit : String)
{
if(GameManager.receiveDamage)
{
//To do Enviar reduccion de life
if(!audio.isPlaying)
{
if(life < 0.5 && (Random.Range(0, 100) < 30))
{
audio.clip = dyingSound;
}
else
{
audio.clip = hitSounds[Random.Range(0, hitSounds.length)];
}

audio.Play();
}

if(gameObject.layer != 13)
{

var _usePhoton : GameObject;
_usePhoton = GameObject.Find("_GameManager/UsePhoton");
_usePhoton.SendMessage("DownLife",ActorNr);

return;
}
life -= 0.05;



recoverTime = (1.0 - life) * 10.0;

if(hit == "Dummy")
{
TrainingStatistics.dummiesHit++;
}
else if(hit == "Turret")
{
TrainingStatistics.turretsHit++;
}
if(life <= 0.0)
{
AtackerName = hit;
DisplayKillYou = true;
SoldierController.dead = true;

}

}
}

function DisplayCountDown(time : int)
{
yield WaitForSeconds (time);
DisplayKillYou = false;
}

function Update()
{

if(actorText != null)
{

var textMesh : TextMesh = actorText.GetComponent(TextMesh);
textMesh.text = ActorName;
// text looking into oposite direction of camera
this.actorText.transform.position = transform.position + this.actorTextOffset;
var camDiff : Vector3 = actorText.transform.position - Camera.main.transform.position;
var lookAt : Vector3 = actorText.transform.position + camDiff;
this.actorText.transform.LookAt(lookAt);
}

recoverTime -= Time.deltaTime;

if(recoverTime <= 0.0)
{
life += life * Time.deltaTime;

life = Mathf.Clamp(life, 0.0, 1.0);

hitAlpha = 0.0;
}
else
{
hitAlpha = recoverTime / ((1.0 - life) * 10.0);
}

if(!SoldierController.dead)
{
blackAlpha = 0.0;

return;
}


blackAlpha += Time.deltaTime;

if(blackAlpha >= 1.0)
{
life = 1.0;
hitAlpha = 0.0;
blackAlpha = 0.0;
recoverTime = 0;
if(SoldierController.dead)
{
var _DeadUsePhoton : GameObject;
_DeadUsePhoton = GameObject.Find("_GameManager/UsePhoton");
_DeadUsePhoton.SendMessage("Dead", Respawn[Random.Range(0, 13)]);
}
SoldierController.dead = false;


//Application.LoadLevel(0);
//Application.LoadLevel(1);
}



if(DisplayKillYou)
{
DisplayCountDown(7);
}
}

function OnGUI()
{
if(DisplayKillYou)
{
if(AtackerName != "Player"){
GUI.Label(Rect (Screen.width - 200,60,200,50),AtackerName+" killed you",KilledStyle);
}else
{
GUI.Label(Rect (Screen.width - 200,60,200,50),"killed yourself",KilledStyle);
}
}
if(!GameManager.receiveDamage) return;
if(gameObject.layer != 13){
return;
}

var oldColor : Color;
var auxColor : Color;
oldColor = auxColor = GUI.color;

auxColor.a = hitAlpha;
GUI.color = auxColor;
GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), hitTexture);

auxColor.a = blackAlpha;
GUI.color = auxColor;
GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), blackTexture);



GUI.color = oldColor;
}
}