<!DOCTYPE html>
<style>
body {
-webkit-writing-mode: vertical-rl;
}
.multicol {
height: 470px;
float: left;
padding: 10 0px;
border: 5px solid black;
line-height: 20px;
}
.column {
float: left;
height: 150px;
}
.rule {
float: left;
height: 4px;
width: 200px;
background-color: maroon;
margin: 3px 0;
}
</style>
<div class="multicol">
<div class="column">
Line 1<br>
Line 2<br>
Line 3<br>
Line 4<br>
Line 5<br>
Line 6<br>
Line 7<br>
Line 8<br>
Line 9<br>
Line 10<br>
</div>
<div class="rule"></div>
<div class="column">
Line 11<br>
Line 12<br>
Line 13<br>
Line 14<br>
Line 15<br>
Line 16<br>
Line 17<br>
Line 18<br>
Line 19<br>
Line 20<br>
</div>
<div class="rule"></div>
<div class="column">
Line 21<br>
Line 22<br>
Line 23<br>
Line 24<br>
Line 25<br>
Line 26<br>
Line 27<br>
Line 28<br>
Line 29<br>
Line 30<br>
</div>
</div>