Learn Intermediate CSS by Building a Picasso Painting - Step 8

Tell us what’s happening:
Describe your issue in detail here.

I keep getting " You should set the width of the #back-wall selector to 100%" I don’t see what I doing wrong

Your code so far

<!-- file: index.html -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Picasso Painting</title>
    <link rel="stylesheet" href="./styles.css" />
    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css">
  </head>
  <body>
    <div id="back-wall"></div>
  </body>
</html>
/* file: styles.css */
body {
  background-color: rgb(184, 132, 46);
}

#back-wall {
  background-color: #8B4513;

/* User Editable Region */

#back-wall{
  width: 100%;
  height: 60%;
}

/* User Editable Region */

}

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Challenge: Learn Intermediate CSS by Building a Picasso Painting - Step 8

Link to the challenge:

you added a duplicate #black-wall selector line (You already had one from before)