CC: GhoulMonitor

local monitor = peripheral.find("monitor")

if monitor then

    monitor.clear()
    monitor.setCursorPos(1,1)


    local i = 1000


    while true do
        monitor.clear()
        monitor.write(tostring(i))
        i = i - 7
        if i < 0 then
            i = 1000
        end


        sleep(0.5)
    end
else
    print("ERROR")
end