# functions go here

def yes_no(question):
    while True:
        response = input(question).lower()

        if response == "yes" or response == "no":
            return response
        else:
            print("Please answer yes / no")


def instructions():
    """prints instructions"""

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

Roll the dice and try to win!
""")


# Main routine

# ask the user if they want instructions (check they say yes / no)
want_instructions = yes_no("Do you want to see the instructions? ")

# Display the instructions if the user wants to see them...
if want_instructions == "yes":
    instructions()

print()
print("Program continues")