rednet modem minecraft computercraft

local modem = peripheral.wrap("right")
modem.open(3)  -- Open channel 3 so that we can listen on it
local event, modemSide, senderChannel,
  replyChannel, message, senderDistance = os.pullEvent("modem_message")

print("I just received a message on channel: "..senderChannel)
print("I should apparently reply on channel: "..replyChannel)
print("The modem receiving this is located on my "..modemSide.." side")
print("The message was: "..message)
print("The sender is: "..(senderDistance or "an unknown number of").." blocks away from me.")