Minecraft WiFi universal test

local thisID = os.getComputerID()
local otherID = "999999"

local function openRednet()
    local listOfSides = rs.getSides()
    local listofPossibles = {}
    local counter1 = 0
    while true do
      counter1 = counter1 +1

      if peripheral.isPresent(tostring(listOfSides[counter1])) and peripheral.getType(listOfSides[counter1]) == "modem" then
       table.insert(listofPossibles,tostring(listOfSides[counter1]))
      end

      if counter1 == 6 and table.maxn(listofPossibles) == 0 then
       print("no wifi present")
       return nil
      end

      if counter1 == 6 and table.maxn(listofPossibles) ~= 0 then
       rednet.open(listofPossibles[1])
       return listofPossibles[1]
      end
    end
end

local function openMonitor()
    local listOfSides = rs.getSides()
    local listofPossibles = {}
    local counter1 = 0
    while true do
      counter1 = counter1 +1

      if peripheral.isPresent(tostring(listOfSides[counter1])) and peripheral.getType(listOfSides[counter1]) == "monitor" then
       table.insert(listofPossibles,tostring(listOfSides[counter1]))
      end

      if counter1 == 6 and table.maxn(listofPossibles) == 0 then
       print("no monitor present")
       return nil
      end

      if counter1 == 6 and table.maxn(listofPossibles) ~= 0 then
       monitor = peripheral.wrap(listofPossibles[1])
       return listofPossibles[1]
      end
    end
end

modemOn = openRednet()
monitorOn = openMonitor()

function newLine()
  _,cY = monitor.getCursorPos()
  monitor.setCursorPos(1,cY+1)
end

function printAll(message)
    print(message)
    newLine()
    monitor.write(message)
end
function printAll2(message)
    monitor.setCursorPos(1,cY)
    term.clearLine()
    monitor.clearLine()
    print(message)
    monitor.write(message)
end

if modemOn == nil then
    printAll("No WIFI Modem")
    printAll("Will shutdown in 3 seconds")
    sleep(3)
    os.shutdown()
else
    printAll("Opened wifi on "..modemOn.." side")
    printAll("thisId: " .. thisID)
    while not redstone.getInput("bottom") do
        while otherID == "999999" do
            rednet.broadcast(thisID)
            senderId, message, distance = rednet.receive(1)
            if senderId ~= thisID and message ~= nil then
                otherID = message
            end
        end
        sleep(.1)
    end
    sleep(.5)
    rednet.broadcast(thisID)
    printAll("otherId: " .. tostring(otherID))
    newLine()
    newLine()
    while redstone.getInput("bottom") do
        sleep(.1)
        printAll2("Redstone active")
    end
    printAll2("Redstone deactive")
    sleep(2)
    printAll("Will shutdown in 3 seconds")
    sleep(3)
    os.reboot()
end