local variable 'option' referenced before assignment

[RedSkeleton007]

As an example of what my program is supposed to do, lets say, for example, that the user's name was John, and he chose option 0, and then chose option 100.
The resulting cd mix name should be "John's Angry Heavy Metal Mix".

#!/usr/bin/env python3
#BuildYourOwnCDmixName.py

def heavyMetalCDMixName():
    yourName = input("What is your name: ")
    VWL = ["Angry", "Violent", "Crazy", "Dangerous", "Berserk"] #VWL = ViolentWordList
    print("The words in the list include: "
          + "[0]:" + VWL[0] + ", [1]:" + VWL[1] + ", [2]:" + VWL[2] + ", [3]:"
          + VWL[3] + ", [4]:" + VWL[4])
    print("Choose index numbers from [0] to [4] to complete the name for your "
          + str(yourName) + "'s _______ Heavy Metal mix. Enter 100 when you're done.")

    mixName = (str(yourName) + "'s ")

    #option = VWL[]#declare option, so we can use it inside while loop
    while option != 100:
        option = int(input("Enter index number to append to your CD mix's name: "))
        if option == 0:
            mixNameList = list(mixName)#convert mixName to a list,
            mixNameList.insert(0, VML[0])#so we can add the word at VML[0] to the cd mix name
            mixName = ''.join(mixNameList)#convert mixName back to a string
        elif option == 1:
            mixNameList = list(mixName)
            mixNameList.insert(0, VML[1])
            mixName = ''.join(mixNameList)
        elif option == 2:
            mixNameList = list(mixName)
            mixNameList.insert(0, VML[2])
            mixName = ''.join(mixNameList)
        elif option == 3:
            mixNameList = list(mixName)
            mixNameList.insert(0, VML[3])
            mixName = ''.join(mixNameList)
        elif option == 4:
            mixNameList = list(mixName)
            mixNameList.insert(0, VML[4])
            mixName = ''.join(mixNameList)
        elif option == 100:
            print("You named your CD mix: " + mixName)
            break
        else:
            print("You must enter a valid index number between 0 and 4 from VML.")
            continue

def main():
    heavyMetalCDMixName()

main()

The error is this:

Error:
What is your name: Sam
The words in the list include: [0]:Angry, [1]:Violent, [2]:Crazy, [3]:Dangerous, [4]:Berserk
Choose index numbers from [0] to [4] to complete the name for your Sam's _______ Heavy Metal mix. Enter 100 when you're done.
Traceback (most recent call last):
  File "I:/Python/Python36-32/SamsPrograms/BuildYourOwnCDmixName.py", line 48, in <module>
    main()
  File "I:/Python/Python36-32/SamsPrograms/BuildYourOwnCDmixName.py", line 46, in main
    heavyMetalCDMixName()
  File "I:/Python/Python36-32/SamsPrograms/BuildYourOwnCDmixName.py", line 16, in heavyMetalCDMixName
    while option != 100:
UnboundLocalError: local variable 'option' referenced before assignment

I understand what the error is, but I don't know how to declare it (so I can use it) without having to initialize it.
How do I fix this problem?