Car Spawner Is not working!?!

Whenever I have modeled this script with the brick and my car together it just regens every 5 sec instead of till the car is off. How do I fix it?

local car = script.Parent.Parent.Car:Clone()

while true do 

	wait(5)

	
	local n = script.Parent.Parent:FindFirstChild("Car") == nil
	if (n or (script.Parent.Position - script.Parent.Parent.Car.VehicleSeat.Position).magnitude > 40) then
		if (n ~= true) then
			script.Parent.Parent.Car.Parent = game.Workspace
		end
		local c = car:Clone()
		c.Parent = script.Parent.Parent
		c:makeJoints()
	end

end