css - how to draw a vertical line in html using position:relative -

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just out of curiosity, possible draw vertical line in html? the below image general of i'm trying do.

i've succeeded on doing horizontal line using <hr> tag setting position position:relative , z-index: -9999 make go behind colored boxes.

(the colored boxes here represent different images. sorry terrible drawing) when try apply

<hr style="position: relative; width:0px; height:50px; top: 100px;">

the other horizontal lines i've created earlier aren't placed same before. using similar style both horizontal , vertical lines. idea on how or why happens? or impossible do?

thanks in advance!

<div class="test"></div>

sample div created set height how u need

.test{height:100px; width:0px; position:relative; border-left:1px solid gray;}

this work


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