<!DOCTYPE html>
<html lang="en-US">
<head>
<style>
#outerDiv{
display: grid;
border: 1px solid black;
grid-template: 70px 100px 130px / auto auto auto;
}
#outerDiv div{
border: 1px solid #00f;
background-color: rgba(0,0,255,.2);
padding: 25px;
margin: 8px;
text-align: center;
}
</style>
</head>
<body>
<h1>CSS grid-template Property</h1>
<div id="outerDiv">
<div>Div 1</div>
<div>Div 2</div>
<div>Div 3</div>
<div>Div 4</div>
<div>Div 5</div>
<div>Div 6</div>
<div>Div 7</div>
</div>
</body>
</html>