Receiver

local function centertext(text)
local w,h = term.getSize()
term.setCursorPos(math.floor(w/2-text:len()/2+.5), math.floor(h/2+.5))
io.write(text)
end

local function centertextx
local w,h = term.getSize()
term.setCursorPos(math.floor(w/2-text:len()/2+.5), 1
io.write(text)
end

term.clear
term.setCursorPos(1,1)
rednet.open("pos")

centertextx("Computer ID: "..os.getComputerID())
print()
print()

while true do
id,message = rednet.receive()
local nTime = os.Time
time_line = textutils.formatTime(nTime,false)
print(time_line.." > "..message)
monitor = peripheral.wrap("monitorpos")
term.redirect(monitor)
term.setCursorBlink(false)
term.setTextColors(colors.white)
term.setBackgroundColor(colors.black)
term.clear()
term.setCursorPos(1,1)
centertext(message)
term.restaure()
end