W3Schools Tryit Editor

<!DOCTYPE html>
<html>
<head>
<style>
.item1 {
  grid-area: myArea;
}

.grid-container {
  display: grid;
  grid-template:
  'myArea myArea . . .'
  'myArea myArea . . .';
  grid-gap: 10px;
  background-color: #2196F3;
  padding: 10px;
}

.grid-container > div {
  background-color: rgba(255, 255, 255, 0.8);
  text-align: center;
  padding: 20px 0;
  font-size: 30px;
}
</style>
</head>
<body>

<h1>The grid-template Property</h1>

<p>The grid-template property can also specify rows/columns using named grid items</p>
<p>To specify two rows, make one more sequence </p>
<p>Each row is defined by apostrophes (' ').</p>
<p>"myArea" will span the first two columns, in the first two rows:</p>

</body>
</html>