aliens_first_row = Aliens.create_aliens(-250, 240, 15, 36) aliens_second_row = Aliens.create_aliens(-220, 200, 14, 33) aliens_third_row = Aliens.create_aliens(-250, 160, 15, 36) aliens_fourth_row = Aliens.create_aliens(-220, 120, 14, 33) screen.listen() screen.onkey(player.right, "Right") screen.onkey(player.left, "Left") game_is_on = True while game_is_on: screen.update() Aliens.move_cars() missile.move_missile() if missile.ycor() > 240: missile.shoot_again_man(player.xcor(), player.ycor()) for c in range(len(aliens.all_cars)): if missile.distance(aliens.all_cars[c]) < 13: Aliens.destroy_bricks(aliens.all_cars[c]) Aliens.clear_screen(aliens.all_cars[c]) missile.destroy_missile() missile.clear_screen() if player.distance(aliens.all_cars[c]) < 20: win_lose.lose() game_is_on = False if aliens.all_cars[c].ycor() < -250: win_lose.lose()