anchor.diff:    </div>
   
     <div class="col s12 m6">
  -    <div class="card blue lighten-3">
  -      <div class="card-content white-text">
  +    <div class="card">
  +      <div class="card-content">
           <div class="card-title">Word variety</div>
  -        <p>
  -          <%= pie_chart({
  -            'Words used multiple times' => analysis.words_used_repeatedly_count,
  -            'Words used exactly once' => analysis.words_used_once_count
  -          }) %>
  -        </p>
           <div id="graph-word-variety"></div>
         </div>
         <div class="card-action">
  
positive.code: 
    var word_variety_chart = Highcharts.chart('graph-word-variety', {
      chart: {
        type: 'pie'
      },
      series: [{
        name: 'Words used exactly once',
        y: <%= analysis.words_used_once_count %>,
        sliced: true,
        selected: true
      }, {
        name: 'Words used multiple times',
        y: <%= analysis.words_used_repeatedly_count %>,
      }]
    });
  
  
negative.code:   </div>
  
    <div class="col s12 m6">
      <div class="card">
        <div class="card-content">
          <div class="card-title">Word complexity</div>
          <div id="graph-word-complexity"></div>
        </div>
        <div class="card-action">
          <a class="activator blue-text text-darken-4">
            Why is this important?
          </a>
        </div>
        <div class="card-reveal">
  