Untitled

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
<div id="content">

</div>
  <style id="style"></style>
<script id="jsbin-javascript">
var code =`
body {
  background: red;
  color: #fff;
}
`
var n =0
setInterval(function(){
  content.innerHTML = code.substring(0,n)
  style.innerHTML = code.substring(0,n)
  n = n +1
},100)
</script>


<script id="jsbin-source-javascript" type="text/javascript">var code =`
body {
  background: red;
  color: #fff;
}
`
var n =0
setInterval(function(){
  content.innerHTML = code.substring(0,n)
  style.innerHTML = code.substring(0,n)
  n = n +1
},100)</script></body>
</html>