Example 1:
<!DOCTYPE html>
<html>
<head>
<title>Parcel Sandbox</title>
<meta charset="UTF-8" />
</head>
<body>
<div class="flow_column">
<p>1</p>
<p>2</p>
</div>
<style>
.flow_column {
display: flex;
flex-direction: column;
align-items: center;
}
</style>
</body>
</html>