title: How can I show only corner borders?
body: <p>I'm wondering if it's possible in CSS to make a border but only for corner. Something like this:</p>
  <pre><code>****                         ****
  *                               *
  *                               *
  
               CONTENT
  
  *                               *
  *                               *
  ****                         ****
  </code></pre>