A very basic python3.6+ loading bar

scroller.py

# Created after reading http://xn--rpa.cc/irl/term.html
from time import sleep


def scroll(
    width=20,
    dots=5,
    on_char="*",
    off_char="-",
    delay=0.05,
    current_index=0
):
    print_str = list(off_char * width)
    for i in range(dots):
        print_str[(current_index + i) % width] = on_char

    print(
        f"{''.join(print_str)}\r",
        end=""
    )

    sleep(delay)

    scroll(
        width=width,
        dots=dots,
        on_char=on_char,
        off_char=off_char,
        delay=delay,
        current_index=((current_index + 1) % width)
    )


scroll()