A-Frame Course - Source of /examples/0500-environments-03-playarea.html

<!DOCTYPE html>
<html>
  <head>
    <title>Environments - 03 - Play area</title>
    <script src="https://aframe.io/releases/1.4.0/aframe.min.js"></script>
    <script src="https://unpkg.com/aframe-environment-component@1.3.7/dist/aframe-environment-component.min.js"></script>
  </head>
  <body>
    <a-scene>
      <a-entity environment="preset: tron; playArea: 10"></a-entity>

      <a-box
        position="0 0.5 -3"
        height="1"
        width="1"
        depth="1"
        color="white"
      ></a-box>
    </a-scene>
  </body>
</html>