Cannot click button hidden under image

I am trying to create touch on screen animation,but when i click on button the animation show up before button don t and it doesn t click on him.Don t know how and why that happens.I tried to move both back and forward in canvas but nothing changed

 void Update ()
     {
                 if (Input.touches.Length > 0) {
                 
 
                 
                 for (int i = 0; i < Input.touchCount; i++) {    
                     if(EventSystem.current.currentSelectedGameObject!=null && EventSystem.current.currentSelectedGameObject.name=="Button"){
                         Debug.Log("EventSystem.current.currentSelectedGameObject");
                         return;
                     }
                     //check textures that should not be able to clicked no and show touch animation
                     foreach (GameObject guit in guitextures) {
                         if (guit.GetComponent<GUITexture>() == null || (guit.GetComponent<GUITexture>().HitTest (Input.GetTouch (i).position))) {
                             Debug.Log("Touch on Texture");
                             return;
                         }
                     }
             
                    ray = Camera.main.ScreenPointToRay (Input.GetTouch (i).position);
 
                     switch (Input.GetTouch (i).phase) {
                         case TouchPhase.Began:    
 
                     if (Physics.Raycast (ray, out rayHitInfo) && rayHitInfo.distance<MAX_DISTANCE 
                         && rayHitInfo.transform.tag.Equals(PICKABLE_OBJECTS_TAG)){ 
 
                         Debug.Log("Touch with everything");
 
                             addTouchCursor(Input.GetTouch (i).position.x,Input.GetTouch (i).position.y);
                             rayHitInfo.transform.gameObject.SendMessage ("touchOnObjectBegan", rayHitInfo.distance, SendMessageOptions.DontRequireReceiver);        
                             addTouchCursor(Input.GetTouch (i).position.x,Input.GetTouch (i).position.y);
                     }else{
 
                             addTouchCursorMiss(Input.GetTouch (i).position.x,Input.GetTouch (i).position.y);
                         }
                         break;
 
                         case TouchPhase.Ended:
                             if (Physics.Raycast (ray, out rayHitInfo)){
                                 rayHitInfo.transform.gameObject.SendMessage ("touchOnObjectEnded", SendMessageOptions.DontRequireReceiver);
                             }
                         break;
                 }
             }
         }
     }

and here method addTouchCursor the other use only different prefab almost same

private void addTouchCursor(float x,float y){ GameObject canvas=(GameObject)GameObject.Find("Canvas"); Image image = (Image)GameObject.Instantiate (PREFAB_OBJECT); image.transform.SetParent(canvas.transform,false); RectTransform rectNew=image.GetComponent<RectTransform>(); rectNew.offsetMin=new Vector2(10,10); rectNew.offsetMax=new Vector2(20,20); image.transform.position=new Vector3(x,y,5); }