Blood Script Trouble

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,
#1

I am trying to make a blood sysytem and so far It isn’t working. I copied the script from this video and it doesn’t seem to work (properly). This video is 2 years old and I did have to modify the script a bit due to depricated parts of it.
Blood Script Video

My script:

local bloods = script:WaitForChild("Blood")
local bloodp = script:WaitForChild("ParticleEmitter")

local bloodc = workspace:FindFirstChild("BloodCache")
local tweenService = game:GetService("TweenService")
local playersService = game:GetService("Players")
local raydirectionl

if not bloodc then
	bloodc = Instance.new("Folder", workspace)
	bloodc.name = "BloodCache"
end

local tweenSize = function(part, duration, direction, goal)
	
	local tween = tweenService:Create(part,
		TweenInfo.new(duration, Enum.EasingStyle.Sine, direction),
		{size = goal}
		
	)
	
	tween:Play()
	
	return tween
	
end

local createBlood = function(position)
	
	local randomsize = math.random(2,20) / 10
	
	local bloodclone = bloods:Clone()
	bloodclone.Position = position + Vector3.new(0,0.5,0)
	bloodclone.Size = Vector3.new(randomsize, 0.1, randomsize)
	
	bloodclone.Parent = bloodc
	
	if math.random(2) == 1 then
		bloodclone.blood_splat:Play()
	end
	
	return bloodclone
end

local expandblood = function(part)
	
	local randomincrement = math.random(5,10) / 10
	
	local tween = tweenSize(part, 5, Enum.EasingDirection.Out,
		Vector3.new(part.Size.X + randomincrement, 0.1, part.Size.Z + randomincrement)
	)
	
	spawn(function()
		tween.Completed:Wait()
		tween:Destroy()
		
		part:Destroy()
	end)
end

local raycast = function(character, rayOrigin, rayDirection)
	
	local params = RaycastParams.new()
	params.FilterDescendantsInstances = {character, bloodc}
	params.FilterType = Enum.RaycastFilterType.Exclude
	params.IgnoreWater = true
	
	local raycastResult = workspace:Raycast(rayOrigin, rayDirection, params)
	
	if raycastResult then
		return raycastResult
	end
end

playersService.PlayerAdded:Connect(function(players)
	players.CharacterAdded:Connect(function(character)
		
		local rootPart = character:WaitForChild("HumanoidRootPart")
		
		local humanoid = character:WaitForChild("Humanoid")
		local oldHealth = humanoid.Health
		
		local particlesClone = bloodp:Clone()
		particlesClone.Parent = rootPart
		
		humanoid.HealthChanged:Connect(function(health)
			if health < oldHealth then
				
				oldHealth = health
				
				spawn(function()
					for i = 1, blood_parts_per_hit do
						
						local randomPosition = math.random(-20, 20) / 10
						
						local raycastOrigin = rootPart.Position + Vector3.new(randomPosition, 0, randomPosition)
						local raycastDirection = Vector3.new (0, -8, 0)
						
						local raycastResult = raycast(character, raycastOrigin, raycastDirection)
						
						if raycastResult then
							particlesClone:Emit(2)
							
							delay(0.5, function()
								local newBlood = createBlood(raycastResult.Position)
								expandblood(newBlood)
								
								delay(blood_destroy_delay, function)
								deleteBlood(newBlood)
							end)
						end
					end
					
					wait(math.random(0.5, 2) / 10)
				end)
			end
		end)
	end)
end)

Video what the scrpit is doing:

What did I do wrong?