Progressbar and slider

<!DOCTYPE html>
<html lang="ja">
  <head>
    <meta charset="utf-8">
    <title>jQuery UI</title>
    <link rel="stylesheet" href="jquery-ui.min.css">
    <script src="./external/jquery/jquery.js"></script>
    <script src="jquery-ui.min.js"></script>
    <style>
    .ui-selected {
      background: red;
    }
  </style>
  </head>
  <body>
  <div id="bar" style="width:200px"></div>
  <div id="slider" style="width:200px; margin-top:20px"></div>

  <script>
    $(function(){
      $('#bar').progressbar({
          value: 0
      });
      $('#slider').slider({
        slide: function(event, ui){
          console.log(ui.value);
          $('#bar').progressbar('option', 'value', ui.value);
        }
      });
      });
  </script>
  </body>
</html>