the count remains the same

Hi! I have these scripts that work well. Now when I click the mouse to shoot, the count remains the same, as at 16. I want a script that counts when I shoot a grenade at least until you get to zero.

1° script

static var GRENADE_AMMO = 0;

function OnControllerColliderHit(hit : ControllerColliderHit)
{ if(hit.gameObject.tag == "crateGrenades") { Destroy(hit.gameObject);

    GRENADE_AMMO += 4;
    
    print("YOU NOW HAVE "+ GRENADE_AMMO +" GRENADES");
    GameObject.Find("g_Count").guiText.text = ""+GRENADE_AMMO;

}
}

2° script

function Awake() { guiText.text = ""+0;

}