JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
  <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Dolorem omnis veritatis unde ratione quasi laboriosam placeat quidem repellendus doloribus eveniet pariatur obcaecati ducimus quo possimus velit, eos cum enim minima.</p>
</div>

CSS

.wrapper {
  border: 2px solid gold;
  width: 400px;
  padding: 20px 40px 20px 20px;
  position: relative;
}

.wrapper:after {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  right: 20px;
  height: 100%;
  width: 2px;
  border-right: 2px dashed #000;
}