javascript - Using HTML5 canvas tutorial. Menu not working. Jquery plugin -

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for reason code drawing portion of html5 canvas tutorial working quite fine. can't menu show up.

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>          <script type="text/javascript" src="sketch.js"></script>     </head> <body>     <div class="tools">   <a href="#colors_sketch" data-download="png" style="float: right; width: 100px;">download</a> </div>     <canvas id="simple_sketch" width="1200" height="800"></canvas> <script type="text/javascript">   $(function() {     $('#simple_sketch').sketch();   });    $(function() {     $.each(['#f00', '#ff0', '#0f0', '#0ff', '#00f', '#f0f', '#000', '#fff'], function() {       $('#colors_demo .tools').append("<a href='#colors_sketch' data-color='" + + "' style='width: 10px; background: " + + ";'></a> ");     });     $.each([3, 5, 10, 15], function() {       $('#colors_demo .tools').append("<a href='#colors_sketch' data-size='" + + "' style='background: #ccc'>" + + "</a> ");     });     $('#colors_sketch').sketch();   }); </script>


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