startup

local host = 1
rednet.open("front")
local mon = peripheral.wrap("top")
mon.setBackgroundColor(colors.black)
mon.clear()
rednet.send(host,"ping")
local status = rednet.receive()
mon.setBackgroundColor(tonumber(status))
mon.clear()
while true do
  local event, a, b = os.pullEvent()
  if event == "rednet_message" and a == host then
    mon.setBackgroundColor(tonumber(status))
    mon.clear()
  elseif event == "monitor_touch" then
    rednet.send("host","open")_
  end
end