Only one function working?

I adapted a free model script that creates blocks behind a player when they run. One function creates a blur (tall blocks player-sized), one function creates lightning (0.2² blocks) and one function fades them. However when the script is run only the lightning and fade functions work. There are no errors in the output. Here is the script:

tool = script.Parent
lastpoint = script.Parent.Position
leds = {}
function makeled()
	local tip = script.Parent
	if tip~= nil then
		local off = tip.Size.z/2
		local point = (tip.CFrame*CFrame.new(0, 0, -off)).p
		local unit = (lastpoint - point).unit
		local mag = (lastpoint - point).magnitude
		if tool.Parent.Humanoid.WalkSpeed > 55 and mag>10 then
			local middle = lastpoint-(unit*(mag/2))
			local cf = CFrame.new(middle, point)
			local l = Instance.new("Part")
			l.Shape = tip.Shape
			l.Name = "Zoom"
			l.Anchored = true
			l.CanCollide = false
			l.Size = Vector3.new(tip.Size.x, tip.Size.y, mag)
			l.BrickColor = BrickColor.new("Bright red")
			l.Reflectance = tip.Reflectance
			l.TopSurface = 0
			l.Transparency = 0.8
			l.BottomSurface = 0
			l.Parent = tip
			l.CFrame = cf
			table.insert(leds, l)
			lastpoint = point
		end
	end
end
function fade()
	for i, v in pairs(leds) do
		if v~= nil then
			if v.Name == "electrik" then
				v.Transparency = v.Transparency+0.2
			elseif v.Name == "Zoom" then
				v.Transparency = v.Transparency + 0.04
			end
			if v.Transparency>1 then
				v:remove()
			end
		end
	end
end

function makelig()
	local tip = script.Parent
	if tip~= nil then
		local off = tip.Size.z/2
		local point = (tip.CFrame*CFrame.new(0, 0, -off)).p
		local unit = (lastpoint - point).unit
		local mag = (lastpoint - point).magnitude
		if tool.Parent.Humanoid.WalkSpeed > 55 and mag>10 then
			local middle = lastpoint-(unit*(mag/2))
			local cf = CFrame.new(middle, point)
			local l = Instance.new("Part")
			l.Shape = tip.Shape
			l.Name = "electrik"
			l.Anchored = true
			l.CanCollide = false
			l.Size = Vector3.new(0.2, 0.2, mag)
			l.BrickColor = BrickColor.new("Bright yellow")
			l.Reflectance = tip.Reflectance
			l.Material = "Neon"
			l.TopSurface = 0
			l.Transparency = 0
			l.BottomSurface = 0
			l.Parent = tip
			l.CFrame = cf
			table.insert(leds, l)
			lastpoint = point
		end
	end
end

while true do
	makelig()
	makeled()
	wait()
	fade()
	wait()
end

makelig() is lightning and makeled() is blur. Can anyone help?