term.clear()
term.setCursorPos(1,1)
print("Chaos Gremlin Protection System")
local secret = ""
local input = ""
write("log in: ")
while true do
  local event, extra = os.pullEventRaw()
  if event == "terminate" then
    print("\nnice try")
    write("log in: ")
    input = ""
  elseif event == "char" then
    input = input .. extra
    write("*")
  elseif event == "key" then
    if extra == 259 and #input > 0 then
      x, y = term.getCursorPos()
      x = x - 1
      term.setCursorPos(x, y)
      write(" ")
      term.setCursorPos(x, y)
      input = string.sub(input, 1, string.len(input) - 1)
    elseif extra == 257 then
      if input == secret then
        break
      else
        print("\nbegone, intruder\n\""..input.."\" is wrong")
        write("log in: ")
        input = ""
      end
    end
  end
end

print()