Please help, it says a bool value error when there was no mistake in the script?

local spotlightorange = workspace.OrangeLightSignal.SpotLight
local spotlightred = workspace.RedLightSignal.SpotLight
local spotlightgreen = workspace.GreenLightSignal.SpotLight
local function turnGreen()
   workspace:WaitForChild("GreenLightSignal").Material = Enum.Material.Neon
spotlightgreen.Enabled = true
   workspace:WaitForChild("OrangeLightSignal").Material = Enum.Material.SmoothPlastic
spotlightorange.Enabled = false
   wait(8)
end
local function turnOrange()
   workspace:WaitForChild("RedLightSignal").Material = Enum.Material.SmoothPlastic
spotlightred.Enabled = false
   workspace:WaitForChild("OrangeLightSignal").Material = Enum.Material.Neon
spotlightorange.Enabled = true
   wait(8)
end
local function turnRed()
	workspace:WaitForChild("OrangeLightSignal").Material = Enum.Material.SmoothPlastic
spotlightorange = false
	workspace:WaitForChild("RedLightSignal").Material = Enum.Material.Neon
	spotlightred.Enabled = true
	wait(8)
end
local function turnFlashingOrange()
	local OrangeLightSignal = workspace:WaitForChild("OrangeLightSignal")
	workspace.GreenLightSignal.Material = Enum.Material.SmoothPlastic
	OrangeLightSignal.Material = Enum.Material.Neon
	spotlightorange.Enabled = true
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.SmoothPlastic
	spotlightorange.Enabled = false
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.Neon
		spotlightorange.Enabled = true
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.SmoothPlastic
	spotlightorange.Enabled = false
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.Neon
		spotlightorange.Enabled = true
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.SmoothPlastic
	spotlightorange.Enabled = false
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.Neon
		spotlightorange.Enabled = true
		wait(0.5)
	OrangeLightSignal.Material = Enum.Material.SmoothPlastic
	spotlightorange.Enabled = false
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.Neon
		spotlightorange.Enabled = true
	wait(0.5)
	OrangeLightSignal.Material = Enum.Material.SmoothPlastic
		spotlightorange.Enabled = false
end

while true do
	wait(1)
	turnOrange()
	turnGreen()
	turnFlashingOrange()
	turnRed()
end