What's wrong in here in this class .bb3 its not passing the test

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Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">    
  <head>
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />   
  </head>

  <body>
    <div class="background-buildings">
      <div></div>
      <div></div>
      <div class="bb1">
        <div class="bb1a bb1-window"></div>
        <div class="bb1b bb1-window"></div>
        <div class="bb1c bb1-window"></div>
        <div class="bb1d"></div>
      </div>
      <div class="bb2">
        <div class="bb2a"></div>
        <div class="bb2b"></div>
      </div>
      <div class="bb3"></div>
      <div></div>
      <div class="bb4"></div>
      <div></div>
      <div></div>
    </div>

    <div class="foreground-buildings">
      <div></div>
      <div></div>
      <div class="fb1"></div>
      <div class="fb2"></div>
      <div></div>
      <div class="fb3"></div>
      <div class="fb4"></div>
      <div class="fb5"></div>
      <div class="fb6"></div>
      <div></div>
      <div></div>
    </div>
  </body>
</html>
/* file: styles.css */
.bb3 {
  width: 10%;
  height: 55%;
  background: var(--building-color3);
  background: repeating-linear-gradient(90deg,
      var(--building-color3) 0%,
      var(--building-color3) 7.5%,
      var(--window-color3) 15%
    );
}

/* User Editable Region */

.bb3 {
  width: 10%;
  height: 55%;
  background: var(--building-color3);
  background: repeating-linear-gradient(90deg,
    var(--building-color3) 0%,
    var(--building-color3) 7.5%,
    var(--window-color3) 15%
  );
}


/* User Editable Region */

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User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Challenge Information:

Learn CSS Variables by Building a City Skyline - Step 60

You appear to have created this post without editing the template. Please edit your post to Tell us what’s happening in your own words.

Read the second half of the last paragraph again, carefully. You only need one percentage value, the rest are calculated automatically.