index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <title>Basemap Example</title>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
    <link rel="shortcut icon" href="http://cartodb.com/assets/favicon.ico" />
    <link rel="stylesheet" href="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/themes/css/cartodb.css" />

    <style>
      html, body, #map {
        height: 100%;
        padding: 0;
        margin: 0;
      }
    </style>

  </head>
  <body>
    <div id="map"></div>
    <script src="https://cartodb-libs.global.ssl.fastly.net/cartodb.js/v3/3.15/cartodb.js"></script>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
      <script>

      function main() {
        var map = L.map('map', {
          center: [40.742216, -74.20655],
          zoom: 11,
          zoomControl: true
        });
        L.tileLayer('http://{s}.tile.stamen.com/toner/{z}/{x}/{y}.png', {
          attribution: 'Stamen'
        }).addTo(map);
        cartodb.createLayer(map, 'https://team.cartodb.com/u/chandra/api/v2/viz/fd5891d6-7db4-11e5-84fe-0e31c9be1b51/viz.json')
         .addTo(map)
         .on('done', function(layer) {

          }).on('error', function() {
            console.log("some error occurred");
          });
      }
      window.onload = main;
    </script>

  </body>
</html>