adding set to 10% on all sides.</div>
    </section>

    <textarea class="playable playable-css" style="height: 120px">
.box {
  border: 5px solid darkblue;
  width: 300px;
  margin: 10%;
  padding: 10%;
}</textarea
    >

    <textarea class="playable playable-html" style="height: 120px">
<div class="box">
  I have margin and padding set to 10% on all sides.
</div></textarea
    >

    <div class="playable-buttons">
      <input id="reset" type="button" value="Reset" />
    </div>
  </body>
  <script src=