Unity 3d OnTriggerExit'ten Sonra Position Çalışmıyor

 
  using UnityEngine; 
  using System.Collections; 
   
  public class Pozisyon : MonoBehaviour { 
   
  	// Use this for initialization 
  	void Start () { 
  	 
  	} 
  	public float duration = 10.0f; 
   
  	// Update is called once per frame 
  	void Update () { 
  		Vector3 esref = new Vector3(0,0.03f,0); 
  		transform.position += esref; 
   
  	} 
  	void OnTriggerStay(Collider other) { 
  		transform.Rotate (Vector3.up, 2000.0f * Mathf.Deg2Rad / duration * Time.deltaTime); 
  	} 
  	void OnTriggerExit(Collider other) { 
  		Vector3 esrefa = new Vector3(20.5f,0,0); 
  		transform.position += esrefa; 
  	} 
  }