Schedule Timer - Possibly working overboard on doing this?

I'm trying to generate a bell system relying on a table.. I feel like there's an easier method of checking what time its on, and using it to check what period its on. So far, here is my results. Although it's going great and barely working, Is there a better way to prevent un-necessary server load? I'm all in trying my best to keep the server working on important tasks like keeping players lag free..

PSchedules={
    {"TESTBLOCK",{
    --  name            time start  time end
        {"Period 1",    10,41,      10,43},
        {"Period 2",    10,45,      10,46},
        {"Period 3",    10,47,      10,49},
        {"Period 4",    10,50,      10,51}
    }}
}
require game.ServerScriptStorage.GetTime; --returns a function that gives back my current time in this format (return hour,min,sec,amORpm)
function StartBell(schedu)
    local bellloop=true
    local schn=tonumber(schedu)
    if schn~=nil then
        local hours,mins,secs,pm=GetTime()
        local checkloop=1
        local isonperiod=false
        for a=1,#PSchedules[schn][2] do
            print(hours,PSchedules[schn][2][a][2])
            if hours>=PSchedules[schn][2][a][2] then 
                if mins>=PSchedules[schn][2][a][3] then
                    print("passd "..schn,a)
                    checkloop=a
                end 
            end 
        end 
        if hours <= PSchedules[schn][2][checkloop][4] then
            if mins < PSchedules[schn][2][checkloop][5] then
                isonperiod=true
            end
        end 
        repeat
            hours,mins,secs,pm=GetTime()
            local remainmins=0
            isonperiod=false
            if hours <= PSchedules[schn][2][checkloop][4] then
                if mins < PSchedules[schn][2][checkloop][5] then
                    if hours > PSchedules[schn][2][checkloop][2] then
                        if mins >= PSchedules[schn][2][checkloop][3] then
                            isonperiod=true
                        end
                    end 
                end 
            end 
            if isonperiod==true then
                print("Is On Period..")
                remainmins=0
                if hours < PSchedules[schn][2][checkloop][4] then
                    remainmins=PSchedules[schn][2][checkloop][4]-hours
                    remainmins=remainmins*60
                    print("Added "..remainmins".. to remaining time..")
                end 
                if PSchedules[schn][2][checkloop][5] > mins then
                    remainmins=remainmins+PSchedules[schn][2][checkloop][5]-mins
                end
                print("Remaining Time set to "..remainmins)
            else
                print("Is Not On Period..")
                if PSchedules[schn][2][checkloop]==nil then
                    bellloop=false
                    print("The bell could NOT find the next loop and died..")
                else
                    if PSchedules[schn][2][checkloop][2]==hours then
                        if PSchedules[schn][2][checkloop][3]<mins then
                            checkloop=checkloop+1
                            print("Added to next wait loop")
                        end
                    end
                    if PSchedules[schn][2][checkloop][2]==hours then
                        print("Waiting Till Next Period..")
                        remainmins=0
                        if hours < PSchedules[schn][2][checkloop][2] then
                            remainmins=PSchedules[schn][2][checkloop][2]-hours
                            remainmins=remainmins*60
                        end 
                        if PSchedules[schn][2][checkloop][5] > mins then
                            remainmins=remainmins+PSchedules[schn][2][checkloop][3]-mins
                        end
                    end
                end 
            end 
            print("CurrentTime: "..hours..":"..mins)
            print("NextPeriodBeforeTime: "..PSchedules[schn][2][checkloop][2]..":"..PSchedules[schn][2][checkloop][3])
            print("NextPeriodAfterTime: "..PSchedules[schn][2][checkloop][4]..":"..PSchedules[schn][2][checkloop][5])
            print("RemainingMinutes: "..remainmins)
            print("CurrentSchedule: "..PSchedules[schn][1])
            print("CurrentPeriod: "..PSchedules[schn][2][checkloop][1])
            print("Is it that period?: "..(isonperiod and "true" or "false"))
            print("----------------------------------")
            wait(2)
        until bellloop==false
    end
    print("TheBellDied..")
    bellloop=false
end 
StartBell(1)

Am I going overboard on how to check for this information, or is their an easier way?