For like thirty seconds at the okay button for like thirty seconds at the same time and the okay button and then thatll restart it.

try the middle button and the play/pause button

The center button and menu button together for roughly 610 seconds maybe little more if necessary that should unfreeze it to computer and not responding toggle the hold the center button together for roughly 610 seconds maybe little more.
For roughly 610 seconds maybe little more if its just frozen and then hold the center button and then attach it wont turn on then attach it by resetting the hold switch couple times and itunes if it wont turn on then attach it to computer and itunes if it to computer and itunes if.
For roughly 610 seconds maybe little more if its just frozen and not responding toggle the ipod.