<h5>hello world!</h5><p>this is a sample block.</p><style>h5{background:red}</style><script>module.exports={init:function(t){var e,n=this;t==null&&(t={});this.root=t.root;e=document.createElement("div");this.root.appendChild(e);console.log("init!");this.c=0;return setInterval(function(){e.innerText=n.c;return n.c++},1e3)}};</script>