<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.box1 {
grid-area: header;
}
.box2 {
grid-area: left;
}
.box3 {
grid-area: main;
}
.box4 {
grid-area: right;
}
.box5 {
grid-area: footer;
}
.grid-container {
display: grid;
grid-template-areas: 'header header header header header header' 'left main main main right right' 'left footer footer footer footer footer';
grid-gap: 5px;
background-color: #555;
padding: 10px;
}
.grid-container > div {
background-color: #ccc;
text-align: center;
padding: 30px 0;
font-size: 30px;
}
</style>
</head>
<body>