from mouse import move
from secrets import randbelow
from time import sleep


def erratic_movement(screen_width, screen_height):
    """
    Moves the cursor to a random position with the screen's width and height as an upper bound
    """
    move(
        randbelow(screen_width), randbelow(screen_height),
    )


def main():
    """
    Calls the movement function in an infinite loop, with a random delay between each call
    """
    screen_width = 800
    screen_height = 600
    while True:
        erratic_movement(screen_width, screen_height)
        sleep(randbelow(90))


if __name__ == "__main__":
    main()