<body style="-webkit-writing-mode:vertical-rl">
<div style="height:750px; -webkit-column-count:2; -webkit-column-fill:auto; -webkit-column-rule:2px solid grey; column-count:2; column-rule:2px solid grey; border:5px solid black; padding:5px;width:300px; ">
<div style="width:250px"></div>
<div style="display:inline-block; border:2px solid green">
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
All of this text should be in the second column.<br>
</div>

</div>