You can clone with
HTTPS or Subversion.
Please see this link (test site)
on IPAD -- There is a white square that comes up as a placeholder before each transition (in between each image)
It goes away when next slide displays and then reappears, and so on in between slides.
IPAD only -- when I refresh the page, the white squares disappear.
All okay on other platforms (so far as I've tested) - no issues / no white squares
Unable to center the page -- I always use
Thank you for the advice