[Computercraft] MultiScreen Server

rednet.open("right")
monitor = peripheral.wrap("back")
serverID = 0

monitorWidthSmall = 82
monitorWidthBig = 16

monitor.clear()
monitor.setTextScale(5)
monitor.setCursorPos(1,1)

term.clear()
term.setCursorPos(1,1)

while true do

  a,b,c = rednet.receive()

  --sendedPcPos = string.sub(b, 1, string.find(b.."","$",1,true) -1)
  --sendedCursorPos = string.sub(b, string.find(b.."","$",1,true) + 1, string.find(b.."","%",1,true) -1)
  --sendedCursorPos = tonumber(sendedCursorPos)
  --sendedMessage = string.sub(b, string.find(b.."","%",1,true) + 1, -1)
  fullMessage = b

  if a == serverID then

  if string.sub(fullMessage, 1, 1) == "$" then

    if string.sub(fullMessage, 2, -1) == "clear" then

      monitor.clear()

    end

  else

    sendedPcPos = string.sub(fullMessage, 1, string.find(fullMessage.."","$",1,true) -1)
    sendedCursorPosX = string.sub(fullMessage, string.find(fullMessage.."","$",1,true) + 1, string.find(fullMessage.."","&",1,true) - 1)
    sendedCursorPosX = tonumber(sendedCursorPosX)
    sendedCursorPosY = string.sub(fullMessage, string.find(fullMessage.."","&",1,true) + 1, string.find(fullMessage.."","%",1,true) - 1)
    sendedCursorPosY = tonumber(sendedCursorPosY)
    sendedMessage = string.sub(fullMessage, string.find(fullMessage.."","%",1,true) + 1, -1)

    if sendedPcPos == "1" then

      monitor.setCursorPos(sendedCursorPosX,sendedCursorPosY)
      monitor.write(sendedMessage.."                                             ")

    elseif sendedPcPos == "2" then

      monitor.setCursorPos(sendedCursorPosX - 16, sendedCursorPosY)
      monitor.write(sendedMessage.."                                             ")

    elseif sendedPcPos == "3" then

      monitor.setCursorPos(sendedCursorPosX - 32, sendedCursorPosY)
      monitor.write(sendedMessage.."                                             ")

    elseif sendedPcPos == "4" then

      monitor.setCursorPos(sendedCursorPosX - 48, sendedCursorPosY)
      monitor.write(sendedMessage.."                                             ")

    end

  end

  end

end