on rightclick on book:
	open chest with 2 rows named "&1Menu Wyboru Parkour" to player
	wait 1 tick
	format slot 1 of player with 1 gray stained glass named "Tlo" to close
	format slot 2 of player of gray stained glass named "Tlo" to close then run [execute player command "/toxic tutaj wpisz komende dolaczajaca na pk xd"]