[NOT SOLVED] Why doesn't this work?

Everything seems to work, apart from the zombie cloning for Lighting then putting it into the 'Zombies' group in workspace. No errors come up on the console either. Any help would be appreciated.

Lighting = game:service("Lighting")

function waittime()
	wait(10)
end

Lighting.TimeOfDay = "06:00:00"


while true do
	wait()
	waittime()
	
	zombieswork = game.Workspace.Zombies:GetChildren()
	
for i = 1, #zombieswork do
	zombieswork[i]:remove()
	
	waittime()
	
for i = 10, 1, -1  do
	
	zombieslight = game.Lighting.Zombies:GetChildren()
	zombieslight:clone()
	zombieslight.parent = game.Workspace.Zombies
	print('Zombie spawned')

end
end
end

Try a while true do loop

while true do
--clone script
wait(10)
end