How do I fix this script not activating after moving it?

I have a random rain generator, but everytime it turns on, the rain doesnt appear, even thought the script for it is in the correct place. If I place the script directly into there, it does work.

Is my code not correct for this, or do scripts not work if you move them into the place where you want them to activate?

wait (10)
random = math.random(1,100)        

if random > 0 and random < 100 then
workspace.Rain.Sky.Parent = game.Lighting
workspace.Rain.RainScript.Parent = game.StarterPlayer.StarterPlayerScripts --Moves the Sky, rain and droplets into the starterscripts, where they should 
workspace.Rain.ScreenRain.Parent = game.StarterPlayer.StarterPlayerScripts --activate and cause rain to appear
end

wait (20)

random = math.random(1,100)        

if random > 0 and random < 100 then
game.Lighting.Sky.Parent = workspace.Rain
game.StarterPlayer.StarterPlayerScripts.ScreenRain.Parent = workspace.Rain --Moves the Sky, rain and droplets back to their original location
game.StarterPlayer.StarterPlayerScripts.RainScript.Parent = workspace.Rain
end