* {
  margin: 0;
  padding: 0;
}

#container {
  margin: 200px auto;
  width: 400px;
  height: 220px;
  background-image:-webkit-linear-gradient(0deg,#E1DEB0 50%,transparent 50%,transparent);
  background-image:-moz-linear-gradient(0deg,#E1DEB0 50%,transparent 50%,transparent);
  background-image:-o-linear-gradient(0deg,#E1DEB0 50%,transparent 50%,transparent);
  background-image:linear-gradient(90deg,#E1DEB0 50%,transparent 50%,transparent);
  background-size:10% 100%;
}