arcade_spawning

    def enemy_spawns(self):

        if len(self.enemy_sprite_list1) == 0:
            enemy_count1 = random.randint(18, 35)  # To set a random number of enemies to spawn (first row)

            for _ in range(enemy_count1):  # Populating the first row on enemies.
                self.enemy_sprite = Enemies()
                self.enemy_sprite_list1.append(self.enemy_sprite)

            for enemy in self.enemy_sprite_list1:  # Setting the positions of the first row of enemies.
                enemy.center_x = random.randrange(0 + enemy_radius / 2, WINDOW_WIDTH - enemy_radius / 2, enemy_radius)
                enemy.center_y = WINDOW_HEIGHT + enemy_radius * 2
                while arcade.check_for_collision_with_list(enemy,
                                                           self.enemy_sprite_list1):  # So that enemies don t spawn overlapped.
                    enemy.center_x = random.randrange(0 + enemy_radius / 2, WINDOW_WIDTH - enemy_radius / 2,
                                                      enemy_radius)

        for enemy1 in self.enemy_sprite_list1[0:1]:      ### Here we only need to look at one sprite in this list

            if enemy1.center_y <= WINDOW_HEIGHT / 2 and len(
                    self.enemy_sprite_list2) == 0:  # When the first row of enemy is at half screen (500) we create and spawn the second row.
                enemy_count2 = random.randint(18, 35)  # To set a random number of enemies to spawn (second row)

                for _ in range(enemy_count2):  # Populating the second row of enemies.
                    self.enemy_sprite = Enemies()
                    self.enemy_sprite_list2.append(self.enemy_sprite)

                for enemy2 in self.enemy_sprite_list2:  # Setting the positions of the second row of enemies.
                    enemy2.center_x = random.randrange(0 + enemy_radius / 2, WINDOW_WIDTH - enemy_radius / 2,
                                                       enemy_radius)
                    enemy2.center_y = WINDOW_HEIGHT + enemy_radius * 2
                    while arcade.check_for_collision_with_list(enemy2,
                                                               self.enemy_sprite_list2):  # So that enemies don t spawn overlapped.
                        enemy2.center_x = random.randrange(0 + enemy_radius / 2, WINDOW_WIDTH - enemy_radius / 2,
                                                           enemy_radius)

            if enemy1.center_y < 0:  # When the obstacles's center is below the screen
                for sp in self.enemy_sprite_list1:      ### one sprite from list1 hit bottom, so kill all of this list
                   del sp
                self.enemy_sprite_list1.clear()  # clear the sprite list.
                self.score_updated = False  # Current row's score can be updated again.

        for enemy2 in self.enemy_sprite_list2[0:1]:         ### Here we only need to look at one list2 enemy sprite

            if enemy2.center_y < 0:
                self.score_updated = False  # Current row's score can be updated again.
                for sp in self.enemy_sprite_list2:          ### One sprite hit bottom, so kill all of this list
                   del sp
                self.enemy_sprite_list2.clear()             ### move the clear() down to here