JSFiddle - React, Tailwind, and code Playground

HTML

<div>●</div>

CSS

div {
    font-size: 70px;
    font-family: Arial;
    margin: 10px;
    color: rgba(10, 10, 10, 0.5);
}

div:hover::before {
    content: '©';
    font-size: 70px;
    position: absolute;
    top: 15px;
    left: 5px;
    color: rgba(10, 10, 10, 0.5);
}