<h1 id="header">Hello</h1>
<script src="./app.js">
<script type="text/javascript">
turnGreen();
</script>
end

<h1 id="header">Hello</h1>
<script src="./app.js" type="text/javascript" />
<script type="text/javascript">
turnGreen();
</script>
end

Update the way to load the external script.
Update the way to load the external script.