title: How to use top margin perfectly?
body: <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>#container {
    width: 350px;
    height: 300px;
    background-color: tomato;
    margin: 20px auto;
  }
  
  h1 {
    margin: 10px;
    background-color: blue;
    overflow: auto;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="container"&gt;
    &lt;h1&gt;Hello&lt;/h1&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  <blockquote>
  <p>The two element should have margin, but there is no any margin. How margin could be placed between them</p>
  </blockquote>