Minecraft Skript fly + gm 0/gm 1/ gm 3 command

#--------------------------
#Skript by FipsundMunne
#YT =FipsundMunne
#--------------------------

on join:
	set {fly.%player%} to false

command /fly:
	permission: fly.admin
	trigger:
		if {fly.%player%} is false:
			set player's flight mode to true
			set {fly.%player%} to true
			send "&aDu kannst nun fliegen!"
		else:
			set player's flight mode to false
			set {fly.%player%} to false
			send "&aDu kannst nun nicht mehr fliegen"

command /gm <number>:
	permission: gm.admin
	trigger:
		if arg is 0:
			set player's gamemode to Survival
		if arg is 1:
			set player's gamemode to Creative
		if arg is 3:
			make player execute command "/gamemode 3"