JSFiddle - React, Tailwind, and code Playground

HTML

<input id="hititle">

JavaScript

async function looptext() {
  while(true) {
    document.getElementById("hititle").value = '1';
    await sleep(2000)
    document.getElementById("hititle").value = '2';
    await sleep(2000)
    document.getElementById("hititle").value = '3';
    await sleep(2000)
    document.getElementById("hititle").value = '4';
    await sleep(2000)
    document.getElementById("hititle").value = '5';
  }
}

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

looptext();