startup.lua

print("init")
sleep(os.clock()<2 and 2-os.clock() or 0)
print("run")

local alarm = 2 + (55/60)
local player = "SukaiPoppuGo"
local message = "Reboot dans 5min"

assert(peripheral.find("chatBox"),"chatBox introuvable")

repeat
    local h = os.time("local")
    local diff = h < alarm and alarm - h or 24 - h + alarm
    local delay = os.startTimer(diff * 60 * 60)

    repeat
        local t = os.time("local")

        term.setCursorPos(1,1)
        term.clear()
        local sTime = textutils.formatTime(t,true)
        local sAlarm = textutils.formatTime(h+diff-t, true)

        print(" time:",sTime)
        print("alarm:",sAlarm)

        --Monitor du pauvre
        local monitor = peripheral.find("minecraft:sign")
        if monitor then
            monitor.setSignText("","§ltime: "..sTime,"§lalarm: "..sAlarm)
        end

        local tick = os.startTimer(20)
        local e,p
        repeat
            e,p = os.pullEventRaw()
            if e == "terminate" then
                local monitor = peripheral.find("minecraft:sign")
                if monitor then
                    monitor.setSignText("","§4§lTerminated")
                end
                printError("Terminated")
                return
            end
        until e == "timer" and p == tick
    until e == "timer" and p == delay

    print("Alarm")
    local chatBox = peripheral.find("chatBox")
    assert("chatBox","chatBox introuvable")
    chatBox.tell(player,message)
    sleep(20)
until false