<div class="container">
  <p>Change the values of the <code>background-position</code> property offsets to see how the background is positioned inside the container. The initial value set below are <code>20px 20px</code>, so the image is moved 20px to the bottom and 20px to the right.</p>
  <div class="el">

  </div>
</div>
body {
  background-color: #F5F5F5;
  color: #555;
  font-size: 1.1em;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.container {
  margin: 40px auto;
  width: 100%;
  max-width: 700px;
}

.el {
  width: 100%;
  height: 300px;
  border: 3px solid #0099cc;
  background-image: url(http://tympanus.net/codrops-playground/assets/images/cssref/datatypes/position/swallow.png);
  background-repeat: no-repeat;
  background-position: 20px 20px;
}

code {
  background-color: #eee;
  padding: 1px 5px;
}