The speed in the editor is different from the front end.
The effect will not be complete in the editor because the js is only executed in the front end.
Important watch the tutorial: https://youtu.be/ZHHJLM2u9-0
<script> const textLists = document.querySelectorAll('.fb-infinite-h__list'); textLists.forEach(textList => { const originalItems = textList.children; const totalItems = originalItems.length; /* Clone items */ for (let i = 0; i < totalItems; i++) { const clone = originalItems[i].cloneNode(true); textList.appendChild(clone); } /* If you have very few items, clone again */ for (let i = 0; i < totalItems; i++) { const clone = originalItems[i].cloneNode(true); textList.appendChild(clone); } for (let i = 0; i < totalItems; i++) { const clone = originalItems[i].cloneNode(true); textList.appendChild(clone); } }); </script>