title: Select every Nth element in CSS
body: <p>Is it possible to select, say, every fourth element in a set of elements?</p>
  
  <p>Ex: I have 16 <code>&lt;div&gt;</code> elements... I could write something like.</p>
  
  <pre><code>div:nth-child(4),
  div:nth-child(8),
  div:nth-child(12),
  div:nth-child(16)
  </code></pre>
  
  <p>is there a better way to do this?</p>