As the Keepers card is at the end of the stack, you can get to it with either repeated View/Go Next actions, or just a single View/Go Last action.
mediaURL. You should now have something looking like this:
touchStarthandler of the Prev button:
if the name of this card is not "Keepers" then go previous end if
touchStarthandler of the Next button:
if the number of this card < the number of cards then go next end if