12.html

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
<div class="container">
    <div class="grid-item">1</div>
    <div class="grid-item">2</div>
    <div class="grid-item">3</div>
    <div class="grid-item">4</div>
    <div class="grid-item">5</div>
</div>
<style>
    .container {
        display: grid;
        grid-gap: 10px;
        height: 100vh;
    }

    .grid-item {
        background-color: lightcyan;
        font-size: 40px;
    }

    .grid-item:nth-of-type(3) {
        order: 1;
    }
</style>
</body>
</html>