Restart Error when using code from lesson book

[Kathleen57]

Hi. I am very new to programming but am trying to learn Python. I am using Coding Projects in Python by DK. It's supposed to be a guessing game. Using IDLE, I type in the code which I copied from the book but get this restart error: >>>
= RESTART: C:\Users\kchristy\AppData\Local\Programs\Python\Python38-32\nine_lives.py
>>>
Here is the code I typed in IDLE:

import random

lives = 9
words = ['pizza', 'dance', 'kitty', 'puppy', 'snowy', 'sleep', 'scale', 'tulip', 'cacti', 'plane', 'otter', 'shirt', 'fairy', 'angel', 'plate', 'email','horse']
secret_word = random.choice(words)
clue = list('?????')
heart_symbol = u'\u2764'
guessed_word_correctly = False

def update_clue(guessed_letter, secret_word, clue):
index = 0
while index < len(secret_word):
if guessed_letter == secret_word[index]:
clue[index] = guessed_letter
index = index + 1

while lives > 0:
print(clue)
print('Lives left: ' + heart_symbol * lives)
guess = input('Guess a letter or the whole word: ')

if guess == secret_word:
guessed_word_correctly = True
break

if guess in secret_word:
update_clue(guess, secret_word, clue)
else:
print('Incorrect. You lose a life')
lives = lives - 1

if guessed_word_correctly:
print('You won! The secret word was ' + secret_word)
else:
print ('You lost! The correct word was ' + secret_word)


I appreciate any help! Thank you.