[IF] Pomoc z if

Dzien dobry,
proszę o pomoc z tym skriptem:
 

On Player World Change:
	if "%player's world%" is "world":
		if player has diamond named "&6&lWybierz Tryb": #zmien na compass
			stop
		else:
			set slot 0 of player to diamond named "&6&lWybierz Tryb" #zmien na compass
			stop
on click with diamond:
    if player has diamond named "&6&lWybierz Tryb"
        open virtual chest inventory to player
        format gui slot 0 of player with stone named "It won't do anything"
        format gui slot 1 of player with stone named "It will just close" to close
        format gui slot 2 of player with stone named "It will just close but only with pressing a number key" to close using number key
        format gui slot 3 of player with stone named "It will make the player execute a command, but he might not have permission" to run player command "/gui"
        format gui slot 4 of player with stone named "It will make the player execute a command with ""*"" permission" to run player command "/gui" with permission "*"
        format gui slot 5 of player with stone named "It will make the console execute a command" to run console command "/gui"
        format gui slot 6 of player with stone named "It will run the function doSomething()" to run function doSomething()
        format gui slot 7 of player with stone named "It will close and then run the function doSomething()" to close then run function doSomething()
        format gui slot 8 of player with stone named "It will run doSomething() if you click on it with a stone" to run function doSomething() with cursor stone
        format gui slot 9 of player with stone named "It will run the gui event" to run gui event
 
function doSomething(i: int = 0): #TuSKe will run this function even if it was loaded after the command above. Need 1.7.2+ for it.
    broadcast "And it did"

chodzi mi dokladniej zeby po On click with diamond: dalej jesli gracz mial by diament z nazwą "&6&lWybierz Serwer" to otwieralo by mu sie te menu.