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<!DOCTYPE html>
<link rel="author" title="Javier Contreras" href="mailto:javiercon@microsoft.com">
<style>
body {
margin: 0px;
}
.section {
position: relative;
margin-bottom: 20px;
}
.flex {
display: flex;
gap: 10px;
width: 230px;
}
.flex > * {
background: lightgray;
width: 50px;
height: 50px;
}
.col-rule {
position: absolute;
width: 10px;
height: 50px;
top: 0px;
}
</style>
<div class="section">
<div class="col-rule" style="left: 50px; background: red;"></div>
<div class="col-rule" style="left: 110px; background: green;"></div>
<div class="col-rule" style="left: 170px; background: blue;"></div>
<div class="flex" style="direction: ltr;">
<div></div><div></div><div></div><div></div>
</div>
</div>
<div class="section">
<div class="col-rule" style="left: 50px; background: blue;"></div>
<div class="col-rule" style="left: 110px; background: green;"></div>
<div class="col-rule" style="left: 170px; background: red;"></div>
<div class="flex" style="direction: rtl;">
<div></div><div></div><div></div><div></div>
</div>
</div>
<div class="section">
<div class="col-rule" style="left: 50px; background: red;"></div>
<div class="col-rule" style="left: 110px; background: green;"></div>
<div class="col-rule" style="left: 170px; background: blue;"></div>
<div class="flex" style="direction: ltr;">
<div></div><div></div><div></div><div></div>
</div>
</div>