text: <!DOCTYPE html>
  <title>flexbox | flex: 0 1 N | shrinking</title>
  <link rel="author" href="http://opera.com" title="Opera Software">
  <style>
  div {
  	background: blue;
  	margin: 1em 0;
  	border: 1px solid black;
  	height: 8em;
  	width: 12em;
  }
  span {
  	background: white;
  	margin: 1em 0;
  	width: 3em;
  	height: 6em;
  	display: inline-block;
  }
  span:nth-child(1) {background: yellow;}
  span:nth-child(2) {background: pink;}
  span:nth-child(3) {background: lightblue;}
  span:nth-child(4) {background: grey;}
  </style>
  
  <div>
  	<span>one</span><span>two</span><span>three</span><span>four</span>
  </div>
  