[SuperZen]

<div class="rotate"></div>
<script>
  document.addEventListener('DOMContentLoaded', () => {
    const obj = { text: 'Всем привет' }
    const rotateEl = document.querySelector('.rotate')
    setInterval(
      () => rotateEl.innerText = obj.text = obj.text[obj.text.length - 1] + obj.text.slice(0, -1),
      100
    )
  })
</script>