Learn CSS Flexbox by Building a Photo Gallery - Step 5

Tell us what’s happening:
I don’t know what I have to do, someone help me pls

Your code so far
Your new div element should come after your .header element.

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Photo Gallery</title>
    <link rel="stylesheet" href="./styles.css">
  </head>
  <body>
   <div class="header">
    <h1>CSS FLEXBOX PHOTO GALLERY</h1>
  </div>
  <div id="gallery" class="gallery">
        <img src=""   />
        <img src=""   />
        <img src=""   />
        <img src=""   />
        <img src=""   />
        <img src=""   />
        <img src=""   />
        <img src=""   />
        <img src=""   />
        </div>
    </header>
  </body>
</html>
/* file: styles.css */

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Challenge: Learn CSS Flexbox by Building a Photo Gallery - Step 5

Link to the challenge:

Please read the instructions carefully. Below the closing ‘header’ tag, you should add an opening ‘div’ tag with a class set to ‘gallery’ (without ‘id’). Then, following the instruction you have to add nine ‘img’ elements, without any attribute such as src=" " . After all ‘img’ elements add the closing ‘div’ tag.