<!DOCTYPE html>
<p>There should be one square and two smaller rectangles below. All blue. No red should be seen.</p>
<div style="columns:2; column-gap:0; width:200px; column-fill:auto; height:40px; line-height:20px;">
    <div style="height:19px;"></div>
    <div style="columns:2; column-gap:0;">
        <div style="height:2px;"></div>
        <div style="width:20px; height:40px; background:red;">
            <div style="column-span:all; height:10px;"></div>
            <div style="background:blue;"><br></div>
        </div>
    </div>
</div>