Time Of Day Alerts Scripting Error?

I am trying to make a Time Of Day Alert GUI I have amde the script and the GUI but it wont work please help.

If you cant explain can you come on studio and help me?

--Environment Tracking
local timeOfDayNotifications={
    ["12:00:00"]={
        title="Break Time";
        desc="Go have fun, and workout!";
    }
}
local envTracker,currentTimeNotification
envTracker=heartbeat:connect(function()
    if not currentTimeNotification then
        for a,b in next, timeOfDayNotifications do 
            if lighting.TimeOfDay==a then
                currentTimeNotification=b
                openNotification(b.title,b.desc, function()
                    currentTimeNotification=nil
                end)
            end 
        end 
    end
end)

PART 2

--Service shorthands
local tS=game:GetService("TweenService")
local lighting=game.Lighting
function tween(t,s,d,p,o)
    return tS:Create(o,TweenInfo.new(t,Enum.EasingStyle[s],Enum.EasingDirection[d]),p)
end

--Environmnet Controller
spawn(function()
    while wait(1) do
        tween(1,"Sine","Out", {ClockTime=lighting.ClockTime+1/60},lighting):Play()
    end
end)