Pygame:我如何生成随机出现和倒下的东西？

import pygame

pygame.init()

window_width = 800
window_height = 600
window = pygame.display.set_mode((window_width, window_height))
pygame.display.set_caption("Random Falling Objects")

class FallingObject:
    def __init__(self, x, y, speed):
        self.x = x
        self.y = y
        self.speed = speed

    def update(self):
        self.y += self.speed

    def draw(self):
        pygame.draw.circle(window, (255, 0, 0), (self.x, self.y), 10)

import random

objects = []

def generate_random_object():
    x = random.randint(0, window_width)
    y = 0
    speed = random.randint(1, 5)
    new_object = FallingObject(x, y, speed)
    objects.append(new_object)

# 在游戏循环中调用生成随机物体的函数
generate_random_object()

while True:
    # 游戏循环代码

    for obj in objects:
        obj.update()
        obj.draw()

while True:
    # 游戏循环代码

    for obj in objects:
        obj.update()
        obj.draw()

        if obj.y > window_height:
            objects.remove(obj)