I want spawner not working while invisible.

Hello Guys.
My problem is; I have a spawner and I want this spawner not working while invisible. But After invisible will work. But codes not working pls help me.

Code (CSharp):

1. public class HazardSpawner : MonoBehaviour
2. {
3.     [SerializeField] GameObject hazardGameObject;
4.     Renderer m_Renderer;
5.  
6.     bool spawn = true;
7.  
8.     void Start()
9.     {
10.          m_Renderer = GetComponent<Renderer>();
11.             StartCoroutine(HazSpawner());
12.     }
13.  
14.     void Update()
15.     {
16.         HazSpawner();
17.     }
18.  
19.  
20.     IEnumerator HazSpawner()
21.     {
22.  
23.         if (m_Renderer.isVisible)
24.         {
25.             while (spawn)
26.             {
27.  
28.                 yield return new WaitForSeconds(Random.Range(1f, 2f));
29.                 Instantiate(hazardGameObject, transform.position, Quaternion.identity);
30.  
31.             }
32.         }
33.            
34.                  
35.     }
36.  
37.    
38.     private void OnBecameVisible()
39.     {
40.         enabled = true;
41.     }
42.     private void OnBecameInvisible()
43.     {
44.  
45.         enabled = false;
46.     }
47.  
48. }

 

Change this:

Code (CSharp):

1. if (m_Renderer.isVisible)
2. {
3.     while (spawn)
4.     {
5.         yield return new WaitForSeconds(Random.Range(1f, 2f));
6.         Instantiate(hazardGameObject, transform.position, Quaternion.identity);
7.     }
8. }

to this:

Code (CSharp):

1. while (spawn)
2. {
3.     if (m_Renderer.isVisible)
4.     {
5.         yield return new WaitForSeconds(Random.Range(1f, 2f));
6.         Instantiate(hazardGameObject, transform.position, Quaternion.identity);
7.     }
8.     else {
9.         yield return null;
10.     }
11. }