Pass number

# Challenge 3
import random
def number_code(game):
    if game == "yes":
        n1 = random.randint(0,9)
        n2 = random.randint(0,9)
        n3 = random.randint(0,9)
        n4 = random.randint(0,9)
        n5 = random.randint(0,9)
        n6 = random.randint(0,9)
        print("Your pass code is : " + str(n1) + str(n2) + str(n3) + str(n4) + str(n5) + str(n6))
    return
# loop
finished = False
while finished == False:
    game = input("Do you want to select a pass code?: yes/no: ")
    if game == "yes":
        number_code(game)
    else:
        print("Your answer has been... " + game + " , bye.")
        break