JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

CSS

body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.digit {
  display: inline-block;
  font: bold 32px monospace;
  color: white;
  background: black;
  margin: 10px;
  padding: 10px;
  border-radius: 5px;
}

JavaScript

function output(value) {
  document.querySelector('div').innerHTML = Array
    .from(`${value}`, n => `<span class="digit">${n}</span>`)
    .join('');
}


let value = 0;
setInterval(() => output(value++), 100);