BackPack - Minecraft 1.15

command /plecak:
	aliases: backpack, bp
	trigger:
		set {open_backpack::%player%} to true
		open chest with 6 rows named "Plecak" to player
		wait 1 tick
		loop 6*9 times:
			set slot loop-number - 1 of current inventory of player to {backpack::%player%::%loop-number%}
		stop

on inventory close:
	if {open_backpack::%player%} is true:
		clear {backpack::%player%::*}
		set {backpack::%player%::*} to items in the current inventory of player
		delete {open_backpack::%player%}
		stop