startup

m = peripheral.find("modem")
m.open(150)

while true do
a,b,c,d,e = os.pullEvent("modem_message")
if e == "REQFILE" then
  local file = fs.open("/prog","r")
  local f = file.readAll()
  file.close()
  m.transmit(c,c,f)
end
end