health drops to soon

I like to know why if i shoot de enemy it's health going down to health1 and not step by stept: health10,health9,health8,...health1?

static var healthcount:int=10;

var health0:Texture2D;

var health1:Texture2D;

var health2:Texture2D;

var health3:Texture2D;

var health4:Texture2D;

var health5:Texture2D;

var health6:Texture2D;

var health7:Texture2D;

var health8:Texture2D;

var health9:Texture2D;

var health10:Texture2D;

function Start () {

}

function Health2(){

var healthtexture = GameObject.Find("10");

if(healthcount <10){ healthtexture.guiTexture.texture = health9; }

if(healthcount <9){ healthtexture.guiTexture.texture = health8; }

if(healthcount <8){ healthtexture.guiTexture.texture = health7; }

if(healthcount <7){ healthtexture.guiTexture.texture = health6; }

if(healthcount <6){
healthtexture.guiTexture.texture = health5; }

if(healthcount <5){ healthtexture.guiTexture.texture = health4; }

if(healthcount <4){ healthtexture.guiTexture.texture = health3; }

if(healthcount <3){ healthtexture.guiTexture.texture = health2; }

if(healthcount <2){ healthtexture.guiTexture.texture = health1; }

if(healthcount <1){ healthtexture.guiTexture.texture = health0; }

}

InvokeRepeating("Gothit",0,0.5); function Gothit(){ healthcount -=1; }

function OnTriggerEnter(myTrigger : Collider){

 if(myTrigger.gameObject.tag == "Enemy"){
 Health2();
     if (healthcount <0){    
         Destroy(gameObject.Find("Enemy Car"));
     }
 }

}