<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
.container {
display: flex;
margin-bottom: 10px;
justify-content: center;
}
.container > div {
width: 50px;
height: 50px;
margin: 0 2px;
background-color: red;
}
</style>
</head>
<body>
<section class="container">
<div class="element">1</div>
<div class="element-1">2</div>
<div class="element">3</div>
<div class="element-2">4</div>
<div class="element">5</div>
<div class="element-3">6</div>
</section>
</body>
</html>
так?