this is an automated way to play ultra hardcore or survival hardcore simply type the number of minutes you want to play for press the button, then press the green button to start the timer. you will need to download this scoreboard file then locate the world and paste the scoreboard file into "data" you will need mcedit 0.1.7.1 to place the timing machine inside your world, there is a tutorial video, if you have any questions feel free to ask me :)

Scoreboard file link:
www.mediafire.com/download/8l3do6346lscpoc/scoreboard.dat