when i try to make the tool FE, it doesn't work & doesn't tell me whats wrong with it. help?

--localscript
local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
local event = script.Parent:WaitForChild("RemoteEvent")
Mouse.Button1Down:connect(function()

event.OnClientEvent:connect(function(player, arguments)
if arguments == true then

elseif arguments == false then
	if Mouse.Target ~= nil then
		Mouse.Target.Parent:FindFirstChild("Humanoid")
		if Mouse.Target.Parent.Humanoid == nil then
			print("you failed...")
		end
		spawn(function()
		if Mouse.Target.Parent.Humanoid ~= nil then
			local Foreign = Mouse.Target.Parent
			local Character = Player.Character
			local Trangle = Foreign.Torso:FindFirstChild("Attachment")
			if Trangle == nil then
				local Link = Instance.new ("Attachment")
				Link.Parent = Foreign.Torso
				Character.Arm1.ControlStone.Beam.Attachment1 = Foreign.Torso.Attachment
				Character.Arm1.ControlStone.Attachment.Shine.Enabled = true
				local anim = Character.Humanoid:LoadAnimation(script:FindFirstChild("Animation"))
				anim:Play()
				wait(1)
	 
	local gradual = 140 -- Smoothness of transition. May be performance hungry but idk.
	 
local waittime = 0.006 -- Speed of transition. Slower at high values and faster at lower values.
	 
	for i = 1, gradual do
	  wait(waittime)
	 local numseq = {NumberSequenceKeypoint.new(0,i/gradual),NumberSequenceKeypoint.new(1,i/gradual)}
	local NS = NumberSequence.new(numseq)
	 
	   Character.Arm1.ControlStone.Beam.Transparency = NS
	end
event:FireServer()
		end
		end
		end)
			
		end
end
end)
end)

--script
script.Parent.RemoteEvent.OnServerEvent:connect(function(player, arguments)
		local Player = game.Players.LocalPlayer
local Mouse = Player:GetMouse()
		if Mouse.Target ~= nil then
		Mouse.Target.Parent:FindFirstChild("Humanoid")
		if Mouse.Target.Parent.Humanoid == nil then
			print("you failed...")
		end
		spawn(function()
		if Mouse.Target.Parent.Humanoid ~= nil then
			local Foreign = Mouse.Target.Parent
			local Character = Player.Character
			local Trangle = Foreign.Torso:FindFirstChild("Attachment")
			if Trangle == nil then
				local Link = Instance.new ("Attachment")
				Link.Parent = Foreign.Torso
				Character.Arm1.ControlStone.Beam.Attachment1 = Foreign.Torso.Attachment
				Character.Arm1.ControlStone.Attachment.Shine.Enabled = true
				local anim = Character.Humanoid:LoadAnimation(script:FindFirstChild("Animation"))
				anim:Play()
				wait(1)
	 
	local gradual = 140 -- Smoothness of transition. May be performance hungry but idk.
	 
local waittime = 0.006 -- Speed of transition. Slower at high values and faster at lower values.
	 
	for i = 1, gradual do
	  wait(waittime)
	 local numseq = {NumberSequenceKeypoint.new(0,i/gradual),NumberSequenceKeypoint.new(1,i/gradual)}
	local NS = NumberSequence.new(numseq)
	 
	   Character.Arm1.ControlStone.Beam.Transparency = NS
	end

		end
		end
		end)
			
		end
end)

i cant solve what i'm doing wrong so if theres anyone out there that can help me or give me something that would solve this please send it. it doesnt even tell me when I press F9