.css">
    <link rel="stylesheet" href="./static/kbd.css">
    <script src="https://d3js.org/d3.v5.min.js"></script>

    <div id="ide-wrapper" class="jsquirrel-ide layout-flex goals-active">
      <div class="jsquirrel" id="input"></div>
      <div id="panel-wrapper" class="jssquirrel-theme-light">
        <div id="toolbar">
          <span id="buttons">
            <button id="down" name="down" alt="Ctrl-Down" 
            title="Ctrl-Down"></button>
            <button id="up" name="up" alt="Ctrl-Up" 
  