JSFiddle - React, Tailwind, and code Playground

HTML

<div class="outer">
    <div class="inner">
    </div>
</div>

CSS

.outer {
    position: absolute;
    top: 20px;
    left: 20px;
    height: 50px;
    width: 100px;
    background: blue;
}
.outer:before {
   content: '';
   margin: 0; padding: 0;
   position: absolute; z-index: -1;
   top: 0; left: 0;
   right: 0; bottom: 0;
   outline: 3px dotted red;
}
.inner {
    position: absolute;
    right: -20px;
    width: 40px;
    top: 15px;
    height: 20px;
    background: yellow;
}