CC VOTE/VOTE

IDAuthen = 22
IDBallot = 49
IDResult = 26
password = "Admin"

rednet.open("top")
function clearScreen()
  term.clear()
  term.setCursorPos(1,1)
end
while true do
  clearScreen()
  print("Please insert ID.")
  os.pullEvent("disk","bottom")
  rednet.send(IDAuthen,disk.getLabel("bottom"))
  sleep(1)
  hUid = fs.open("disk/"..disk.getLabel("bottom"),"r")
  Uid = hUid.readLine()
  hUid.close()
  rednet.send(IDAuthen,Uid)
  id,response = rednet.receive()
  if response == "denied" then
    print("Uid and IGN do not match. please see an admin for assistance.")
    error()
  end
  if response == "accepted" then
    clearScreen()
    while true do
      clearScreen()
      print("welcome to the voting booth!")
      print("type 'list' to list current ballots.")
      print("type 'info' for more info on a ballot.")
      print("type 'vote' to vote on a ballot.")
      print("type 'logout' to exit the booth.")
      local choice = read()
      if choice == password then error() end
      rednet.send(IDBallot,choice)
      if choice == "list" then
        clearScreen()
        id,msg = rednet.receive()
        local list = textutils.unserialize(msg)
        print("The availiable ballots are:")
        for i=1,1000 do
          if list[i] == nil then break end
          if list[i] ~= "idlists" then
            if list[i] ~= "results" then
              print(list[i])
            end
          end
        end
        print("Press any key to continue.")
        os.pullEvent("key")
      end
      if choice == "info" then
        clearScreen()
        print("what ballot would you like information on?")
        ballot = read()
        rednet.send(IDBallot,ballot)
        id,info = rednet.receive()
        clearScreen()
        print("info on "..ballot..":")
        print(nil)
        print(info)
        print(nil)
        print("Press any key to continue.")
        os.pullEvent("key")
      end
      if choice == "vote" then
        clearScreen()
        print("What ballot would you like to vote on?")
        ballot = read()
        rednet.send(IDBallot,ballot)
        rednet.send(IDBallot,Uid)
        id,access = rednet.receive()
        id,info = rednet.receive()
        if access == "denied" then
          clearScreen()
          print("You've already voted on this ballot, please try another.")
          print("Press any key to continue")
          os.pullEvent("key")
        end
        if access == "accepted" then
          while true do
            valid = 0
            clearScreen()
            print("Information on "..ballot..":")
            print(info)
            print(nil)
            print("enter your choice 'yes' or 'no' below.")
            vote = read()
            if vote == "yes" then
              valid = 1
            end
            if vote == "no" then
              valid = 1
            end
            if valid == 1 then
              rednet.send(IDResult,"vote")
              sleep(.5)
              rednet.send(IDResult,ballot)
              sleep(.5)
              rednet.send(IDResult,vote)
              break
            else
              print("'"..vote.."' is not a valid entry. Please enter 'yes' or 'no'.")
            end
          end
        end
      end
      if choice == "logout" then
        disk.eject("bottom")
        print("Thanks for voting!")
        sleep(2)
        rednet.close("top")
        clearScreen()
        os.reboot()
      end
    end
  end
end