JSFiddle - React, Tailwind, and code Playground

HTML

<div id="left_pane">
    <div id="bottom_pic_wrapper">
    </div>
</div>

CSS

#left_pane 
{
    width :100px;
    height:200px;
    position: relative;
    border: 3px coral solid;
}

#bottom_pic_wrapper
{
    width:20px;
    height:30px;
    position: absolute;
    bottom: 0;
    border: 2px coral solid;
}