Before I test would this work? If not could someone fix?

Near the damage zone, there is a anti tieing method, I've created. If it doesn't work please correct it.

r = game:service("RunService")
multiplier=1
local damage = 5
if hit.Parent:FindFirstChild("Lunging").Value == true then
local slash_damage = 0
local lunge_damage = 0
else
local slash_damage = 10
local lunge_damage = 30
sword = script.Parent.Handle
Tool = script.Parent
local SlashSound = Instance.new("Sound")
SlashSound.SoundId = "rbxasset://sounds\\swordslash.wav"
SlashSound.Parent = sword
SlashSound.Volume = .7
local LungeSound = Instance.new("Sound")
LungeSound.SoundId = "rbxasset://sounds\\swordlunge.wav"
LungeSound.Parent = sword
LungeSound.Volume = .6
local UnsheathSound = Instance.new("Sound")
UnsheathSound.SoundId = "rbxasset://sounds\\unsheath.wav"
UnsheathSound.Parent = sword
UnsheathSound.Volume = 1
function blow(hit)
	if (hit.Parent == nil) then return end -- happens when bullet hits sword
	local humanoid = hit.Parent:findFirstChild("Humanoid")
	local plr2=game.Players:playerFromCharacter(hit.Parent)
	local vCharacter = Tool.Parent
	local vPlayer = game.Players:playerFromCharacter(vCharacter)
	local hum = vCharacter:findFirstChild("Humanoid") -- non-nil if tool held by a character
	if humanoid~=nil and humanoid ~= hum and hum ~= nil and plr2~=nil then
		-- final check, make sure sword is in-hand
		local right_arm = vCharacter:FindFirstChild("Right Arm")
		if (right_arm ~= nil) and plr2.TeamColor~=vPlayer.TeamColor then
			local joint = right_arm:FindFirstChild("RightGrip")
			if (joint ~= nil and (joint.Part0 == sword or joint.Part1 == sword)) then
				tagHumanoid(humanoid, vPlayer)
				humanoid:TakeDamage(damage*multiplier)
				wait(1)
				untagHumanoid(humanoid)
			end
		end
	end
end
function tagHumanoid(humanoid, player)
	local creator_tag = Instance.new("ObjectValue")
	creator_tag.Value = player
	creator_tag.Name = "creator"
	creator_tag.Parent = humanoid
end

function untagHumanoid(humanoid)
	if humanoid ~= nil then
		local tag = humanoid:findFirstChild("creator")
		if tag ~= nil then
			tag.Parent = nil
		end
	end
end
function attack()
	damage = slash_damage
	SlashSound:play()
	local anim = Instance.new("StringValue")
	anim.Name = "toolanim"
	anim.Value = "Slash"
	anim.Parent = Tool
end
function lunge()
	damage = lunge_damage
	LungeSound:play()
	local anim = Instance.new("StringValue")
	anim.Name = "toolanim"
	anim.Value = "Lunge"
	anim.Parent = Tool
	force = Instance.new("BodyVelocity")
	force.velocity = Vector3.new(0,10,0) --Tool.Parent.Torso.CFrame.lookVector * 80
	force.Parent = Tool.Parent.Torso
	wait(.25)
	swordOut()
	wait(.25)
	force.Parent = nil
	wait(.5)
	swordUp()
	damage = slash_damage
end
end
function swordUp()
	Tool.GripForward = Vector3.new(-1,0,0)
	Tool.GripRight = Vector3.new(0,1,0)
	Tool.GripUp = Vector3.new(0,0,1)
end

function swordOut()
	Tool.GripForward = Vector3.new(0,0,1)
	Tool.GripRight = Vector3.new(0,-1,0)
	Tool.GripUp = Vector3.new(-1,0,0)
end
function swordAcross()
end
Tool.Enabled = true
local last_attack = 0
function onActivated()
	if not Tool.Enabled then
		return
	end
	Tool.Enabled = false
	local character = Tool.Parent;
	local humanoid = character.Humanoid
	if humanoid == nil then
		print("Humanoid not found")
		return 
	end
	t = r.Stepped:wait()
	if (t - last_attack < .2) then
		lunge()
	else
		attack()
	end
	last_attack = t
	Tool.Enabled = true
end
function onEquipped()
	UnsheathSound:play()
end
script.Parent.Activated:connect(onActivated)
script.Parent.Equipped:connect(onEquipped)
connection = sword.Touched:connect(blow)

What is the point of testing if you need to know the errors in advance?