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

hr {
  margin: 50px 0;
}

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

.element {
  width: 100%;
  height: 0;
  padding-top: 75%;
  background: url(http://tympanus.net/codrops-playground/assets/images/cssref/datatypes/basic-shape/spring.jpg);
  background-size: 100% 100%;
  border: 1px solid grey;
  -moz-clip-path: polygon(13% 35%, 25% 18%, 44% 36%, 68% 24%, 97% 51%, 72% 68%, 41% 80%, 11% 65%);
  -webkit-clip-path: polygon(13% 35%, 25% 18%, 44% 36%, 68% 24%, 97% 51%, 72% 68%, 41% 80%, 11% 65%);
  clip-path: polygon(13% 35%, 25% 18%, 44% 36%, 68% 24%, 97% 51%, 72% 68%, 41% 80%, 11% 65%);
}