Auto Scroll Infinity Loop

Scroll_Loop.js

function scrollLoop(delay=5000){ // delay for a animation duration
  $('html, body').on('down', function () {
      $(this).animate({ scrollTop: $(document).height() - $(window).height() }, delay);
      $(this).trigger('up');
  });
  $('html, body').on('up', function () {
      $(this).animate({ scrollTop: 0 }, delay);
      $(this).trigger('down');
  });
  $('html, body').trigger('down'); // start with scroll down
}
scrollLoop(3000); // call Function