Restricted Bastion Program

local function clearScreen()
  term.clear()
  term.setCursorPos(1, 1)
end

local modem = peripheral.find("modem") or error("No modem attached", 0)
modem.open(43) -- Open 43 so we can receive replies

modem.transmit(15, 43, "Remote Connected")

local event, side, channel, replyChannel, message, distance
repeat
  event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
until channel == 43

clearScreen()

print(tostring(message))

os.sleep(1)

clearScreen()

-- Define the allowed options
local allowedOptions = {"Fortress"}

-- Prompt the user to choose from the options
print("Choose one of the following options:")
for i, option in ipairs(allowedOptions) do
  print(i .. ". " .. option)
end

-- Validate user input
local userInput
repeat
  print("Enter the number corresponding to your choice:")
  userInput = tonumber(read())
until userInput and allowedOptions[userInput]

-- Send the chosen option
local chosenOption = allowedOptions[userInput]
modem.transmit(15, 43, chosenOption)

clearScreen()

-- Wait for a reply
repeat
  event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
until channel == 43

clearScreen()

print(tostring(message))

os.sleep(1)
shell.run("Greeting")