Add Adwords Code into Thank You Page

<?php
/**
 * @package	HikaShop for Joomla!
 * @version	2.6.0
 * @author	hikashop.com
 * @copyright	(C) 2010-2015 HIKARI SOFTWARE. All rights reserved.
 * @license	GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
 */
defined('_JEXEC') or die('Restricted access');
?><?php
$app = JFactory::getApplication();
$app->enqueueMessage( JText::_('THANK_YOU_FOR_PURCHASE') );

I want to add this code which came from google adwords:

<!-- Google Code for Adwords conversion Conversion Page -->
<script type="text/javascript">
/* <![CDATA[ */
var google_conversion_id = 1031611572;
var google_conversion_language = "en";
var google_conversion_format = "2";
var google_conversion_color = "ffffff";
var google_conversion_label = "ewHwCPr0uQUQtMn06wM";
var google_conversion_value = 1.00;
var google_conversion_currency = "CAD";
var google_remarketing_only = false;
/* ]]> */
</script>
<script type="text/javascript" src="//www.googleadservices.com/pagead/conversion.js">
</script>
<noscript>
<div style="display:inline;">
<img height="1" width="1" style="border-style:none;" alt="" src="//www.googleadservices.com/pagead/conversion/1031611572/?value=1.00&amp;currency_code=CAD&amp;label=ewHwCPr0uQUQtMn06wM&amp;guid=ON&amp;script=0"/>
</div>
</noscript>