CodePen Embed - CSS3 - Nth of Type Selector

<ul>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
    </ul>
    <ul>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
    </ul>
    <ul>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
      <li>hello</li>
    </ul>

li:nth-of-type(even) {
  background:blue ;
}

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