Learn the CSS Box Model by Building a Rothko Painting - Step 11

Tell us what’s happening:
don’t know what ta do.

  **Your code so far**
/* file: styles.css */
.canvas {
width: 500px;
height: 600px;
background-color: #4d0f00;
}
/* file: index.html */
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Rothko Painting</title>
  <link href="./styles.css" rel="stylesheet">
</head>
<body>

  <div class="canvas">
  </div>

  <div class="canvas">
    
    </div>

</body>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.115 Safari/537.36 OPR/88.0.4412.85

Challenge: Learn the CSS Box Model by Building a Rothko Painting - Step 11

Link to the challenge:

What part of the task is confusing? Try to be as specific as you can please.