[OPEN] Making my own custom function, may I get some help please? (Input values)

Hey guys, I think I'm gonna even make a FixMyScript series out of this :D

Anyways, I tried to make my own function, but apparently the input/output parts don't work!

Thanks in advance!

	local function SplitString(xString, Deliminer, Output1, Output2)
		
		Output1, Output2 = xString:match("(.*)Deliminer(.*)")
		
		
	end
	
	local myString = "NiceBoy;NotABigBoy"
	
	SplitString(myString, ';', xNiceBoy, xNotABigBoy)
	
	print(xNiceBoy .. "====" .. xNotABigBoy)

=======================

Workspace.TESTSCRIPT:30: attempt to concatenate global 'xNotABigBoy' (a nil value)