some konami code easter egg

easter

<script>
  var vari = {
    easter: {
      code: "38 38 40 40 37 39 37 39 66 65",
      userIn: ""
    }
  };

  (function(v) {
    window.addEventListener("keydown", function(e){
      var e = e.keyCode;
      v.userIn += e + " ";

      if (v.userIn.indexOf(v.code) >= 0) {
        var style = jQuery('style').text(jQuery('#anim-rotate').text()),
            $b    = jQuery('body'),
            css   = {};

        $b.append(style);
        jQuery.each(['-moz-', '-webkit-', '-ms-', ''], function(idx, prefix) {
          var props = { 'duration': '0.75s', 'iteration-count': '5', 'name': 'bodyRotate', 'timing-function': 'linear' };
          for (var prop in props) { css[prefix + 'animation-' + prop] = props[prop]; }
        });
        $b.css(css);
        v.userIn = "";
      }
    })
  }(vari.easter));
</script>

<script type="text/css" id="anim-rotate">
  @-webkit-keyframes bodyRotate {
    from { -webkit-transform: rotate(0deg); }
    to { -webkit-transform: rotate(360deg); }
  }
  @-moz-keyframes bodyRotate {
    from { -moz-transform: rotate(0deg); }
    to { -moz-transform: rotate(360deg); }
  }
  @-ms-keyframes bodyRotate {
    from { -ms-transform: rotate(0deg); }
    to { -ms-transform: rotate(360deg); }
  }
  @keyframes bodyRotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
  }

</script>