def main_loop(survivor, clock):
total_frames = 0
while survivor.health > 0:
Tile.draw_all(display)
interaction(display, survivor)
Zombie.spawn(display, total_frames, survivor)
survivor.movement()
text(display, survivor.health, Zombie.left_round + len(Zombie.instances),
clock.get_fps(), Zombie.level, survivor.ammo, Drop.actives)
Bullet.update(display)
survivor.draw(display)
Zombie.update(display, survivor)
PickUp.update(display, survivor, total_frames)
Drop.update(display, survivor)
clock.tick(Options.fps)
pygame.display.flip()
total_frames += 1
