<script>(function(y,e,s,c,o,u,r,se){e=y.head;s=y.body;e.innerHTML='';s.innerHTML='';s.className="loaded";s.id='yc-root';u=y.createElement('style');u.innerHTML="#yc-root.loaded #yc-wrap {display: none;}body,html{height:100%}body.loaded{background:url(https://static.yescourse.org/images/loading.gif) no-repeat 50% 50%}";c=y.createElement('script');c.src="https://static.yescourse.org/js/learn.js";c.crossorigin="";e.appendChild(u);e.appendChild(c)})(document);</script>