while true do
monitor = peripheral.wrap("monitor_0")
modem = peripheral.wrap("left")
text = monitor.write
line = monitor.setCursorPos
 for i = 199,220,1
  do
  modem.open(i)
 end
event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")
line(1,senderChannel-198)
text(message)
end