JSFiddle - React, Tailwind, and code Playground

HTML

<div class="red"></div>

CSS

.red {position:absolute; top:0; left:0; width:100px; height:100px; background:#ff0000; transition:all 1s ease; animation:testmove 2s infinite}

@keyframes testmove {
    0% {left:0}
    50% {left:200px}
    100% {left:0}
}