startup

local failed = true
busr = "dn_nb"
bpass = "secret"

password_server = 0
rednet.open("left")
while true do
term.clear()
term.setCursorPos(15,6)
print("Login system by dn_nb.")
term.setCursorPos(17,8)
print("Select an option.")
term.setCursorPos(20,10)
print("[1] Login")
term.setCursorPos(20,11)
print("[2] Shutdown")
term.setCursorPos(20,13)
write("---> ")
input = read()
if input == "2" then
 os.shutdown()
elseif input == "1" then
 term.clear()
term.setCursorPos(17,6)
 print("Login system by dn_nb.")
term.setCursorPos(17,8)
 write("Username: ")
 username = read()
term.setCursorPos(17,10)
 write("Password: ")
 password = read("*")
 if username == busr then
 if password == bpass then
term.setCursorPos(17,13)
print("Access granted...")
sleep(2)
term.clear()
term.setCursorPos(22,9)
print("Loading.")
sleep(3)
term.clear()
term.setCursorPos(22,9)
print("Loading..")
sleep(3)
term.clear()
term.setCursorPos(22,9)
print("Loading...")
sleep(3)
term.clear()
sleep(1)
term.setCursorPos(10,9)
print("System loaded without any problems.")
sleep(3)
term.setCursorPos(1,1)
term.clear()
break
 end
 end
 rednet.send(password_server, username, true)
 senderId, message, distance = rednet.receive(1)
 if message == "300" then
term.setCursorPos(17,14)
 print("Invalid Username or Password.")
 sleep(3)
 elseif password == message then
 failed = false
 term.clear()
 term.setCursorPos(1,1)
 print("Welcome ", username)
 break;
 else
term.setCursorPos(17,14)
 print("Invalid Username or Password.")
 sleep(3)
 end
else
term.setCursorPos(17,14)
 print("Invalid Command.")
 sleep(2)
end
end