JSFiddle - React, Tailwind, and code Playground

HTML

<div id='box'>ClubDelphi</div>

CSS

#box {
    width: 425px;
    height: 80px;
    border: 2px solid orange;
    padding: 16px;
    font: bold 10px sans-serif;
    line-height: 80px;
    color: gray;
    
    animation: expand 2s forwards infinite;
}

@keyframes expand {
    to {
        font-size: 78px;
    }    
}