var textura_DEISTVIA : Texture2D;
     var texturaPRICELA : Texture2D;
     var position : Rect;
     var deistvie = false;
     var position_2 : Rect;
     var hit : RaycastHit;
     var n = 3;
      
      
   function Start () {
    
     
        position = new Rect((Screen.width - texturaPRICELA.width)/2, (Screen.height - texturaPRICELA.height)/2,
                            texturaPRICELA.width, texturaPRICELA.height);

                            
        position_2 = new Rect((Screen.width - textura_DEISTVIA.width)/2, (Screen.height - textura_DEISTVIA.height)/2,
                            textura_DEISTVIA.width, textura_DEISTVIA.height);
                    
     }

function Update (){  

    
   var fwd = transform.TransformDirection (Vector3.forward);
    
  if (Physics.Raycast (transform.position, fwd,hit, n) && hit.collider.tag == "DEISTVIE"){
      deistvie = true;
      Debug.Log ("Действие");
      }  
      else deistvie = false;
       
}

function OnGUI(){

if(deistvie == true){
GUI.DrawTexture(position_2, textura_DEISTVIA);
Debug.Log ("Текстура действия");
}
  else {   
   GUI.DrawTexture(position, texturaPRICELA);   
   Debug.Log ("Текстура прицела");  
  }
    

}