Server

function rednetOpen()
    for _,v in pairs( rs.getSides() ) do
      if peripheral.getType( v ) == "modem" then
            rednet.open( v )
      end
    end
end

function clear()
  term.setBackgroundColor(colors.black)
  term.clear()
  term.setCursorPos(1, 1)
end

function draw()
  print("Turtle Worldeater Server")
  print("")
  print("1 Mining")
  print("")
  print("2 exit")
end

function DrawWaiting()
    print("Gebe eine Zahl ein")
    print("")
    print("Verbunden sind insgesammt: "..count-1)
end

function receive()
    message = nil
    id, message = rednet.receive()
    if (message == "turtle") or not (message == nil) then
        Arr_ID[count] = id
        count = count + 1
    end
end

function commands()
    i = io.read()
    for j = 1, count do
        if not (Arr_ID[j] == nil) then
            rednet.send(tonumber(Arr_ID[j]), i)
            print("ID: "..Arr_ID[j])
        end
    end
    print("Es wurden ", count-1," Nachrichten gesendet!")
    sleep(1)
end

function Mining()
    while true do
        clear()
        DrawWaiting()
        parallel.waitForAny(receive, commands)
        print("Pupsen")
    end
end

function input()
  local i = io.read()
  if i == "1" then
    Mining()
    return true
  elseif i == "2" then
    return false
  end
  print("Gib was gueltiges ein!")
  sleep(1)
  return true
end

function loop()
  while true do
    clear()
    draw()
    if not input() then break end
  end
  clear()
end

Arr_ID = {}
count = 1
rednetOpen()
loop()