How to execute code WHILE a function runs

[t4keheart]

Hi everyone,
I have some code for a loading bar animation that I would like to run during execution of specific functions. I know some sort of while loop would be used for this, but no matter what I try, it just doesn't do what I want.

Here's the logic I want:

while function1() is running:
      animationFunction()

Here's the animation code:

import time

bar = [
    " [=     ]",
    " [ =    ]",
    " [  =   ]",
    " [   =  ]",
    " [    = ]",
    " [     =]",
    " [    = ]",
    " [   =  ]",
    " [  =   ]",
    " [ =    ]",
]
i = 0

while True:
    print(bar[i % len(bar)], end="\r")
    time.sleep(.2)
    i += 1

I tried a while true, but I'm not sure if or how to say "while function 1 runs" (while function1 true?) in correct python syntax.