Problem wiht RaycastHit2D ! Changing hit's sprite

Hello

I want to change hit's sprite that is in front of my player(2D) with raycast2d

But I have many objects that are the same(have one tag and name and layer) and I want that change the sprite of any these game objects that hit.

I've set the layer just for these game objects. but this code do what I want just for the first hit!!

here is my code Thanks

 function WaitForGh (waitTime : float) {
 
         yield WaitForSeconds (waitTime);
 ghermez = false;
 
 
 }

 function Update () {
 
     var hit: RaycastHit2D = Physics2D.Raycast(transform.position, Vector2.right,20,layer);
 
      if (hit)
 {
 if(hit.collider.transform.gameobject.GetComponent(SpriteRenderer).sprite == "Ghermez")
 print(hit.transform.name);
     if(ghermez){
 WaitForGh(1.5);
 hit.collider.transform.gameObject.GetComponent(SpriteRenderer).sprite = sabz;
 }
 }