<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS grids example</title>
    <style>

    </style>
  </head>

  <body>
    <div class="wrapper">
      <div class="col">1</div>
      <div class="col">2</div>
      <div class="col">3</div>
      <div class="col">4</div>
      <div class="col">5</div>
      <div class="col">6</div>
      <div class="col">7</div>
      <div class="col">8</div>
      <div class="col">9</div>
      <div class="col">10</div>
      <div class="col">11</div>
      <div class="col">12</div>
      <div class="col">13</div>
      <div class="col span6">14</div>
      <div class="col span3">15</div>
      <div class="col span2">16</div>     
    </div>
  </body>
</html>