Touch not working on guiTexture.

I am trying to move the images in the scene through a touch button, i tried something but it doesnt seem to work, and also the the texture doesnt show up on screen.

  public Texture2D Button;
 
     // Use this for initialization
     void Start () {
 
         guiTexture.texture = Button;
     
     }
     
     // Update is called once per frame
     void Update () {
 
         foreach(Touch touch in Input.touches)
         {
             if(guiTexture.HitTest(touch.position) && touch.phase == TouchPhase.Began)
             {
                 Debug.Log("Touching");
                 GameManager.a++;
             }
             else if(guiTexture.HitTest(touch.position) && touch.phase == TouchPhase.Ended)
             {
                 Debug.Log("Not-Touching");
             }
         }
 
     }