HTML-file.html

<!DOCTYPE html>
<html>

<head>
  <meta charset="utf-8" />
  <title>HTML 5 complete</title>
  <!--[if IE]>
<script src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script>

<![endif]-->
  <style>
    article,
    aside,
    dialog,
    figure,
    footer,
    header,
    hgroup,
    menu,
    nav,
    section {
      display: block;
    }
  </style>
</head>

<body>
  <section>
    <h1>自己紹介</h1>
    <p>Hello World</p>
    <p>I am nuka54</p>
  </section>
  <section>
    <h2>好きな食べ物</h2>
    <p>お寿司とお刺身です。</p>
    <h2>苦手な食べ物</h2>
    <p>トマト</p>
  </section>
  <section>
    <h2>趣味</h2>
    <!-- あとで追記 -->
    <p>考え中</p>
  </section>
</body>

</html>