index.html

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF8">
    <title>Cycle-Elm fun</title>
    <style type="text/css" media="all">
      .sections {
        height: 600px;
        width: 1440px;
        margin: auto;
        position: relative;
      }

      .sections > div {
        box-sizing: border-box;
        border: 2px solid white;
        position: absolute;
        display: inline-block;
        width: 33%;
        height: 100%;
      }
      .datamap-asia {
        left: 33%;
      }
      .datamap-us {
        left: 66%;
      }
    </style>
  </head>
  <body>
    <div id="app">
      Press Up/Down/Left/Right or H/J/K/L to move the cursor! Double click the screen to clear your picture! :)
    </div>
    <script src="build/index.js"></script>
  </body>
</html>