Ipad, using safari went to a porn site and now same flashing message keeps jumping up and down and cannot close out
It's probably just a popup that appears every time you launch a page. Here's how you can get rid of it:


Force close Safari.
Turn off Wi-Fi (and cell service, if you have it).
Reopen Safari and, since the page can't load, you won't get the popup.
Close the tab that gave you the popup.
Turn Wi-Fi (and cell service) back on.


Good luck!