EXAMPLE
Run 
<!DOCTYPE html>
<html>

<head>
	<title>The grid-template-areas property in CSS</title>
	<style type="text/css">
		#page {
		  display: grid;
		  width: 100%;
		  height: 250px;
		  grid-template-areas: "head head"
		                       "nav  main"
		                       "nav  foot";
		  grid-template-rows: 50px 1fr 30px;
		  grid-template-columns: 150px 1fr;
		}
		
		#page > header {
		  grid-area: head;
		  background-color: #8cffff;
		}
		
		#page > nav {
		  grid-area: nav;
		  background-color: #ff8ccf;
		}
		
		#page > main {
		  grid-area: main;
		  background-color: #f8cdff;
		}
		
		#page > footer {
		  grid-area: foot;
		  background-color: #8c0fff;
		}
	</style>
</head>

<body>
	<section id="page">
		<header>Header</header>
		<nav>Navigation</nav>
		<main>Main area</main>
		<footer>Footer</footer>
	</section>
</body>

</html>