How can I make both loops run, since I want to be able to move both shooters at a time

Question

def run_game(self):
    """Start main game loop."""
    while True:
        
        for yellow_shooter in self.yellow_shooters.sprites():
            self._check_events_yellow(yellow_shooter)
        
        for red_shooter in self.red_shooters.sprites():
            self._check_events_red(red_shooter)

By doing this I can only move the yellow_shooter, only the one that is above can be moved, how can I make it so that both can move at the same time