#define launcher
def launch():
    while True:
        launcherchoice = input("Type L to login, or C to create a new account: ")
        if launcherchoice == "L":
            login()
        if launcherchoice == "C":
            newaccount()
#define create account
def newaccount():
    while True:
        global user, password
        user = input('Please create a username for yourself. It must be a minimum of 4 characters long: ')
        if len(user) >= 4:
            break
        else:
            print('Your user name must be at least 4 characters long. Please choose a different username')
    while True:
        password = input('Please enter a password. It must be at least 5 characters long: ')
        if len(password) >= 5:
            break
        else:
            print('Your password must be at least 5 characters long. Please choose a different password')
    while True:
        if input("Please re-enter your password: ") == password:
            print ("Thank you {}. Your account has been created" .format(user))
            break
        else:
            print ("Your passwords do not match")
#define login
def login():
    timeout = 0
    while True:
        import sys
        if timeout >= 3:
            print("You have been locked out, due to too many failed attempts")
            sys.exit()
        auth1 = input('To log in, please enter your previously created username: ')
        auth2 = input('Please enter the account password: ')
        if auth1 == user and auth2 == password:
            print('Thank you {}. You have successfully logged in.'.format(user))
            homescreen()
        else:
            timeout += 1
            print('Whoops, something has gone wrong. Please re-enter the correct user name and password')
            continue
def homescreen():
    import sys
    while True:
        print ("Welcome to the Homescreen")
        sys.exit()
launch()