def show_instructions():

    while True:

        answer = input("Do you want to see the instructions? (yes/no): ").lower()

        if answer == "yes" or answer == "y":

            print("""
***** Instructions *****

- Choose how many questions you want.
- Answer multiplication questions.
- Questions are between 1 and 12.
- Get 1 point for each correct answer.
- Your final score is shown at the end.

Good luck!
""")
            break
        elif answer == "no" or answer == "n":
            break
        else:
            print("Please enter yes or no.")

show_instructions()