Edit in JSFiddle

<body>
  <div class="macwrapper">
    <div class="macmain">
      <div class="macouter">
        <div class="macinner">
          <div class="macworkspace">
            <div class="macindent">
              <div class="macscreen"></div>
            </div>
            <div class="macpowerlight"></div>
            <div class="macfloppydrive">
              <div class="macfloppydrivelight">
                <div class="macfloppydrivedark"></div>
              </div>
              <div class="macfloppytray"></div>
            </div>
          </div>
          <div class="macpowerswitch">
            <div class="macbutton"></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</body>