on right click:
	clicked block is sign
	line 1 of clicked block is "&aクリックで牢屋を"
	if {roya} is not set:
		command "setblock 168 2 -498 minecraft:redstone_block"
		set {roya} to 30
		loop 30 times:
			wait a second
			add -1 to {roya}
		delete {roya}
	else:
		send "&a後%{roya}%秒待ってください"