local controller = peripheral.find('arController')
while true do
    controller.clear()

    local time = math.floor(os.time())
    local timeSuffix
    if os.time() < 12 then
        timeSuffix = "am"
    else
        timeSuffix = "pm"
    end

    local endTime
    local endTimeNum = math.floor(60*(os.time() % 1))
    if endTimeNum < 10 then
        endTime = "0" .. tostring(endTimeNum)
    else
        endTime = tostring(endTimeNum)
    end

    controller.drawItemIcon("minecraft:clock", 4, 4)

    controller.drawString(tostring(time % 12) .. ":" .. endTime .. timeSuffix, 20, 8, 16777215)

    os.sleep(0.25)
end