Edit in JSFiddle

<!doctype html>
<html>
<head>
	<meta charset="UTF-8">
</head>

<body>
<h1>
<script>
document.write("현재 시간은 " + new Date());
</script>
</h1>

<style>
h1 { color:red; }
</style>
</body>

</html>