{% set slotId = 'chinkslot-' ~ random(9999) %}
<figure class="op-ad">
    <iframe style="border:0;margin:0;padding:0;">
        <script async='async' src='https://www.googletagservices.com/tag/js/gpt.js'></script>
        <script>
            var googletag = googletag || {};
            googletag.cmd = googletag.cmd || [];
        </script>

        <script>
            googletag.cmd.push(function() {
                googletag.defineSlot('{{ meta.adunit }}',[[300,250],[320,160],[300,100],[320,50]], '{{ slotId }}').addService(googletag.pubads());
                googletag.pubads().enableSingleRequest();
                googletag.pubads().collapseEmptyDivs();
                googletag.enableServices();
            });
        </script>
        <!-- {{ meta.adunit }} -->
        <div id='{{ slotId }}'>
            <script>
                googletag.cmd.push(function() {
                    googletag.display('{{ slotId }}');
                });
            </script>
        </div>
    </iframe>
</figure>