start . me .
Directory path . web , gh , canvas .

HTML Document File : image.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title> canvas </title>
</head>

<body>

  <canvas id="canvas_element"></canvas>
  <style>
    canvas#canvas_element {
      border: 1px solid black;
    }

    body {
      background-color: aquamarine;
    }

    body {
      background-image: url('background.jpeg');
      background-repeat: no-repeat;
      background-attachment: fixed;
      background-size: 100% 100%;
    }
  </style>
  <script src="image.js"></script>

</body>

</html>