private void Preview()
{
panelController.CancelPreview();
IntroObject = Instantiate(towerPrefab.GetComponent <TowerBase>().IntroPrefab, transform.parent);
IntroObject.GetComponent <RectTransform>().anchoredPosition = transform.position.x > 0.0f ? -IntroOffset : IntroOffset;
icon.SetActive(false);
checkMark.SetActive(true);
btn.onClick.RemoveListener(Preview);
btn.onClick.AddListener(Confirm);
}