Why won't this script work?

local function challenge_2()
    wait(5)
    game.Lighting.OutdoorAmbient = Colour3.new(0, 0, 0)
    game.Lighting.Brightness = 0
    game.Lighting.FogColor = Colour3.new(20, 0, 0)
    game.Lighting.FogEnd = 50
    game.Lighting.FogStart = 10
    game.Lighting.TimeOfDay = "12:00:00"
end
local function challenge_2()
    wait(5)
    game.Lighting.OutdoorAmbient = Color3.new(0, 0, 0)
    game.Lighting.Brightness = 0
    game.Lighting.FogColor = Color3.new(20, 0, 0)
    game.Lighting.FogEnd = 50
    game.Lighting.FogStart = 10
    game.Lighting.TimeOfDay = "12:00:00"
end

You typed Colour instead of Color