<div class="wrapper">
  <div class="container">
    <p>
      Lorem ipsum dolor sit amet, consectetur adipisicing elit. Totam, culpa, quas, quos pariatur iure officiis aut asperiores aspernatur doloremque reprehenderit velit laboriosam itaque ipsam saepe quod. Eaque, a debitis consequuntur!
    </p>
    <img src="http://tympanus.net/codrops-playground/assets/images/cssref/properties/mask-size/field.jpg" alt="">
  </div>
</div>
body {
  background-color: #111;
  color: #555;
  font-size: 1.1em;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

.wrapper {
  margin: 20px auto;
  border: 1px solid #333;
  max-width: 740px;
}

.container {
  display: block;
  max-width: 640px;
  padding: 30px;
  height: 400px;
  background-color: white;
  border: 20px solid fuchsia;
  -webkit-mask-image: url(http://tympanus.net/codrops-playground/assets/images/cssref/properties/mask-size/mask-image.png);
  mask-image: url(http://tympanus.net/codrops-playground/assets/images/cssref/properties/mask-size/mask-image.png);
  -webkit-mask-position: center;
  mask-position: center;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-size: 200px 200px;
  mask-size: 200px 200px;
}