What's wrong here / Why is the script not repeating properly? Is it broken?

Here's the script : [Named TurnL]

while true do
    script.Parent.TurnLF.BrickColor = BrickColor.new("Br. yellowish orange")
    script.Parent.TurnLF.SpotLight.Enabled = true
    wait ()
    script.Parent.TurnLF.BrickColor = BrickColor.new("Really black")
    script.Parent.TurnLF.SpotLight.Enabled = false
end

Here's the script that will Activate it. [A Script inside a block, Inside a model to activate TurnL.]

on = false
script.Parent.ClickDetector.MouseClick:connect(function(click)
if on == false then
on = true
script.Parent.Parent.TurnL.Disabled = false
else
on = false
script.Parent.Parent.TurnL.Disabled = true
end
end)

[TurnLF Is Spelled properly, TurnLF has the SpotLight in it, It's in the correct location.]

I have a separate clickdetector with a script in it which activates this script, Clicking again will deactivate it. However, it decides not to loop when activated and only changes the BrickColor and turns on the SpotLight?

How would i get it to Properly loop when the script is activated? I've tried everything I could think of to fix it. Even tried messing around with Script + Block Names.