Thanks for the tips, I got it to work! :)
By the way, could you please tell me the actual script to use to set up a fail timer for:
1) Button mash
2) QTE?
I just realized that if the user doesn't do anything, the event will not end, which can be not very challenging, so I would like to add a timer to force the user to concentrate on this event. Thank you.
Yes, you are right.