public void OnPointerClick(PointerEventData eventData)
    {
        if (stamp.isFollowMouse)
        {
            agendaOk = true;

            stamp.isFollowMouse = false;
            stamp.rectTransform.anchoredPosition = new Vector2(1220, 390);

            stamp.GetComponent <Image>().raycastTarget = true;

            Instantiate(confirm, transform.GetChild(0).transform);
        }
    }