JSFiddle - React, Tailwind, and code Playground

HTML

<div class="marquee">
  <div>Tekst der skal scrolles bla bla bla</div>
</div>

CSS

.marquee {
  background-color: silver;
  overflow: hidden;
}

.marquee > div {
  animation: marquee 10s linear infinite;
}

@keyframes marquee {
  from { transform: translateX(100%); }
  to   { transform: translateX(-100%); }
}