title: Alternate row color for every 3 items?
body: <p>I have a unordered list with 3 items in every row (instead of the default 1). Now I want to alternate the row colors. How would I do that?</p>
  
  <p>So basicially I want to do something like this:</p>
  
  <pre><code>if ($listCount == 1, 2, 3 OR 7, 8, 9 OR 13, 14, 15) {
      $alternateRow = "rowOdd";
  }
  else {
      $alternateRow = "rowEven";
  }
  </code></pre>
  
  <p>(I know this is a syntax error, just trying to explain)</p>
  
  <p>I think it's possible with modulus but to be honest I don't really understand how it works. </p>