Variable not updating as it should?

(code is messy, sorry its one of my first scripts)

What this code is supposed to do is recieve a variable from a script inside a click detector that will activate a selection mode to the player who clicked it, and only for the player who clicked it untill the player closes or leaves (i did not add a way to close it yet) and thats because my selection code is not working because what the code is supposed to do is:

----------------------------------------------------------AIMING AT SCREEN

	for i,v in pairs(SELECTED) do -- error here (SCREEN marks the LAST screen, needs to be updated more?)
		if v == SCREEN then
			INDEX = i
			AAS = true
		elseif v ~= SCREEN then
			AAS = false -- AAS = Aiming At Screen then
		end	
	end

and it does kinda work but when i click to select it, i have to unselect it in the reverse order i clicked them or else it breaks, and im pretty sure its because of the code above, i will send the full code if anyone is interested ( any code with -- before it, its unused code i just did not want to delete)

local remote = game.ReplicatedStorage:WaitForChild("RemoteEvent")

local CLICKED = nil

local plr = game.Players.LocalPlayer

local mouse = plr:GetMouse()

local HL = game.ReplicatedFirst:WaitForChild("SELECTOR HL")

SELECTED = {}

REMOVED = {}

--ADDED = false

NAMEHL = Instance.new("Highlight")

T = false

local CHECK = Instance.new("BoolValue")

HIGL = CHECK

mouse.Button1Down:Connect(function()

	if CLICKED == true then

		--print("test1")

		if CANCLICK == true then

			--HTS = hit.Parent:FindFirstChild("SCREEN")

			--HTSC = HTS:FindFirstChild("Value")

			--if HTSC == nil then

			--	AAS = false

			--else

			--	AAS = true

			--end

			if AAS == true then

				for i,v in pairs(SELECTED) do

					if i == INDEX then            -- REMOVE

						REMOVE = v

						table.insert(REMOVED,REMOVE)

						table.remove(SELECTED,i)

						print("REMOVE")

						print(SELECTED,REMOVED)

					end

					test = table.getn(SELECTED)

					if test == 0 then

						AAS = false

					end
				end
			else
				print("ADD")                       -- ADD
				table.insert(SELECTED, SCREEN)
				print(SELECTED,REMOVED)
		end
---------------------------------------------
			--if SELECTED == {nil} then
			--	table.insert(SELECTED,SCREEN)
			--	print(SELECTED)
			--	print("test5")
				--ADDED = true
			--end
		else
			-- not aiming at LED
		end
	end
end)

remote.OnClientEvent:Connect(function(data)
	CLICKED = data
	print(CLICKED)
end)

while true do

	wait(0.01)

	print(AAS)

	--print(HL.Parent)

	--print(CLICKED)

	hit = mouse.Target

	--print(hit)

	-------------------------------------------------------------ADD HL
	for i,v in pairs(SELECTED) do

		if v ~= false then

			if v:FindFirstChild("HL") == nil then
				local HL1 = Instance.new("Highlight")
				HL1.Parent = v
				HL1.Name = "HL"
				HL1.FillTransparency = 0.5
				HL1.OutlineTransparency = 0
				HL1.DepthMode = Enum.HighlightDepthMode.AlwaysOnTop
				HL1.Enabled = true
				HL1.FillColor = Color3.new(1, 1, 1)
				HL1.OutlineColor = Color3.new(0, 0, 0)
				NAMEHL = HL1
				TESTING = Instance.new("BoolValue")
				TESTING.Parent = v
				
			end
		end
	end
	--------------------------------------------------------------REMOVE
	for i,v in pairs(REMOVED) do
		print(REMOVED,"REMOVED LIST")
		HL1 = v:FindFirstChild("HL")
		NAME1 = HL1
		NAME2 = HL.Name
		if NAME1 == NAME2 then
		else
			print(HL1)
			TESTING:Destroy()
			if HL1 == nil then
			else
				HL1:Destroy()
			end
			--if v:FindFirstChild("Value") ~= nil then
			--	local A = v:FindFirstChild("Value")
			--	A:Destroy()
			--end
			table.remove(REMOVED,i)
			
		end
	end
	----------------------------------------------------------AIMING AT SCREEN
	for i,v in pairs(SELECTED) do -- error here (SCREEN marks the LAST screen, needs to be updated more?)
		if v == SCREEN then
			INDEX = i
			AAS = true
		elseif v ~= SCREEN then
			AAS = false -- AAS = Aiming At Screen then
		end	
	end
	--------------------------------------------------------AIM AT SCREEN
	if hit == nil then
	else
		if hit.Parent ~= nil then
			--print(SCREEN)
			PHIT = hit.Parent
			if CLICKED == true then
				if hit.Parent:FindFirstChild("IsGate") ~= nil then
							
					GATE = hit.Parent:FindFirstChild("IsGate")
					VALUE = GATE.Value
					if VALUE == 12 then
						LED = GATE.Parent:WaitForChild("SCREEN")
						MODEL = LED.Parent
						SCREEN = PHIT:FindFirstChild("SCREEN") -- SCREEN = Last LED hit
						CANCLICK = true
						CHILDRENHL = SCREEN:FindFirstChild("Value")
						--print(CHILDRENHL)
					
						if CHILDRENHL == nil then
							HL.Parent = LED
						else
							HL.Parent = game.ReplicatedFirst
						
					end
				end
			end
		end 
	end
	if MODEL ~= PHIT then
		CHILDRENHL = false
		CANCLICK = false
			HL.Parent = game.ReplicatedFirst
			end
		end
	end

--if v == SCREEN then

--	if TEST ~= true then

--		print("REMOVE")

--		table.insert(REMOVED, v)

--		table.remove(SELECTED, i)

--		--ADDED = false

--	else

--		TEST = false

--	end

--else

--	print(v)
--	table.insert(SELECTED,SCREEN)
--	print(SELECTED)
--	print("ADD")
--	TEST = true
--end

update: i used another code of mine and it worked, by changing some stuff around etc if anyone wants to see the code here it is:

				for i,v in pairs(SELECTED) do         -- !
					local CurrentV = v
					if mouse.Target.Parent:FindFirstChild("SCREEN") == v then
						Skip = true
						--print(Skip)
						table.insert(REMOVED,v)
						table.remove(SELECTED,i)
						print("removed from table")

					end
				end                                         -- .

				if Skip == true then
					Skip = false
					print("skipped")
				elseif Skip == false then
					--print(Skip)
					print("added to table")
					table.insert(SELECTED,mouse.Target.Parent:FindFirstChild("SCREEN"))
					--print(SelectedINPUTS)
				else
					print("ERROR SKIP ~= TRUE/FALSE")
				end

now its just some other errors that i need to fix and i think its done