How to execute code WHILE a function runs

[Gribouillis]

You can do this with threading. My logic is 1) start animation in a different thread, 2) run function 1 3) stop animation. Read this page to start learning about threading in python

import threading
import time

event = threading.Event()

def animation():
    bar = [
    " [=     ]",
    " [ =    ]",
    " [  =   ]",
    " [   =  ]",
    " [    = ]",
    " [     =]",
    " [    = ]",
    " [   =  ]",
    " [  =   ]",
    " [ =    ]",
    ]
    
    i = 0
    while True:
        print(bar[i % len(bar)], end="\r")
        was_set = event.wait(timeout=0.2)
        if was_set:
            break
        i += 1

def function1():
    time.sleep(4)

event.clear()
anim = threading.Thread(target=animation)
anim.start()

function1()
event.set()
anim.join() # <-- wait for anim to terminate
print()