Day Night Cycle -- Roblox

-- Day night cycle
-- Put in ServerScriptService

local lighting = game:GetService("Lighting")
local tweenService = game:GetService("TweenService")

local dayLength = 250 -- How many real-time seconds an in-game day will last
local nightLength = 150 -- How many real-time seconds an in-game night will last

function tween (l, p)
    tweenService:Create(lighting, TweenInfo.new(l, Enum.EasingStyle.Linear, Enum.EasingDirection.In), p):Play()
end

lighting.ClockTime = 6

while dayLength ~= nil do

    tween(dayLength, {ClockTime = 18})
    wait(dayLength)

    tween(4, {OutdoorAmbient = Color3.new(60/255, 60/255, 60/255), FogColor = Color3.new(25/255, 25/255, 25/255), FogEnd = 700})
    tween(nightLength / 2, {ClockTime = 24})
    wait(nightLength / 2)
    tween(nightLength / 2, {ClockTime = 6})
    wait(nightLength / 2)
    tween(4, {OutdoorAmbient = Color3.new(140/255, 140/255, 140/255), FogColor = Color3.new(195/255, 195/255, 195/255), FogEnd = 4500})

end