rendered animation
1<div> 2 <span class="item-1"></span> 3 <span class="item-2"></span> 4 <span class="item-3"></span> 5 <span class="item-4"></span> 6 <span class="item-5"></span> 7 <span class="item-6"></span> 8 <span class="item-7"></span> 9</div>