I'm a bit confused as to how I can go about this. 
I tried: 
 `h1:nth-child(odd) { color: orange; }`  

but that didn't work.

Here's my html:

```
<body>
  <div class="header">
    <header>
      <h1> Simple & Responsive Flexbox Website! </h1>
    </header>
  </div>
</body>

```