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<!DOCTYPE html>
<div style="width: 100px; height: 100px; columns: 2; column-fill: auto; column-gap: 0;">
<div style="display: flex; flex-flow: column; height: 200px;">
<div style="height: 50px; width: 50px; background: yellow;"></div>
<div style="height: 50px; width: 50px; background: purple;"></div>
<div style="height: 50px; width: 50px; background: blue;"></div>
<div style="height: 50px; width: 50px; background: orange;"></div>
</div>
</div>