fixed code maybe

variables:
	{lives.%player%} = 3
	{bancheck.%player%} = 0
	{life.player} = red stained glass pane

on first join:
	set {lives.%player%} to 3
	wait 30 ticks
	message "Your lives have been set to <red>3<reset>. If you run out, you will be banned for 1 day."
	if {bancheck.%player%} = 1:
		set {lives.%player%} to 3
		set {bancheck.%player%} to 0
		wait 30 ticks
		message "You have been restored to <red>3<reset> lives."

on death of a player:
	set {lives.%player%} to {lives.%player%}-1
	if attacker is a player:
		set {lives.%attacker%} to {lives.%attacker%}+1
	if {lives.%player%} < 0:
		wait 15 ticks
		execute console command "/tempban %player% 1d <red>You're dead.<reset>"
		set {bancheck.%player%} to 1

command /lives:
	description: Display how many lives the player has
	aliases: /l, /life, /deaths, /death
	trigger:
		message "You have <red>%{lives.%player%}%<reset> lives."

command /getlives <offline player>:
	description: Get a player's number of lives.
	permission: lives.admin
	aliases: /gl
	trigger:
		message "<red>%offline player-argument%<reset> has <red>%{lives.%offline player-argument%}% lives."

command /addlives <offline player> <integer>:
	description: Add lives to the player.
	permission: lives.admin
	aliases: /al
	trigger:
		add argument 2 to {lives.%offline player-argument%}
		message "Added <red>%integer-argument%</reset> lives to <red>%offline player-argument%."

command /setlives <offline player> <integer>:
	description: Set a player's number of lives.
	usage: /setlives <offline player> <integer>
	permission: lives.admin
	aliases: /sl
	trigger:
		set {lives.%offline player-argument%} to argument 2
		message "Set <red>%offline player-argument%'s<reset> lives to <red>%integer-argument%."

command /livesplus:
	description: opens a GUI of the player's lives
	aliases: /lp
	trigger:
		open virtual chest inventory with size 3 named "&rLives Plus" to player
		if {lives.%player%} = 3:
			format gui slot 11 of player with {life.player} named "&4Life"
			format gui slot 13 of player with {life.player} named "&4Life"
			format gui slot 15 of player with {life.player} named "&4Life"
		if {lives.%player%} = 2:
			format gui slot 11 of player with {life.player} named "&4Life"
			format gui slot 13 of player with {life.player} named "&4Life"
		if {lives.%player%} = 1:
			format gui slot 11 of player with {life.player} named "&4Life"