To set how many columns an element should span, use the column-span property. You can try to run the following code to implement the column-span property:
Example
<!DOCTYPE html>
<html>
<head>
<style>
.demo {
column-count: 4;
column-rule-color: maroon;
column-rule-style: dashed;
}
h1 {
column-span: all;
}
</style>
</head>
<body>
<div class = "demo">
<h1>This is our heading.</h1>
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
This is demo text. This is demo text. This is demo text. This is demo text.
</div>
</body>
</html>