JSFiddle - React, Tailwind, and code Playground

HTML

<div id="container">
    <div id="main_image"></div>
    <div id="overlay_image"></div>
</div>

CSS

#container{
    position: relative;
    width: 200px;
    height: 200px;
}
#main_image{
    width: 100%;
    height: 100%;
    background: blue;
}
#overlay_image{
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    background: red;
}