<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Animations</title>
  <style>
    #canvasbox {
      width: 600px;
      margin: 100px auto;
    }
    #canvas {
      border: 2px solid #B1B1B1;
    }
  </style>
  <script src="canvas.js"></script>
</head>
<body>
  <div id="canvasbox">
    <canvas id="canvas" width="600" height="400"></canvas>
  </div>
</body>
</html>