以下是一個簡單的Python流星雨代碼示例：

import random
import time

# 設置屏幕大小
WIDTH = 80
HEIGHT = 20

# 創建流星
def create_meteor():
    x = random.randint(0, WIDTH)
    y = random.randint(0, HEIGHT // 2)
    speed = random.randint(1, 3)
    return {'x': x, 'y': y, 'speed': speed}

# 移動流星
def move_meteor(meteor):
    meteor['y'] += meteor['speed']
    if meteor['y'] > HEIGHT:
        meteor['x'] = random.randint(0, WIDTH)
        meteor['y'] = random.randint(0, HEIGHT // 2)
        meteor['speed'] = random.randint(1, 3)

# 繪制畫面
def draw_screen(meteors):
    screen = [[' '] * WIDTH for _ in range(HEIGHT)]
    for meteor in meteors:
        x = meteor['x']
        y = meteor['y']
        screen[y][x] = '*'
    for row in screen:
        print(''.join(row))

# 游戲循環
def game_loop():
    meteors = [create_meteor() for _ in range(10)]

    while True:
        move_meteor(meteors[0])  # 只移動第一個流星
        draw_screen(meteors)
        time.sleep(0.1)

if __name__ == '__main__':
    game_loop()

這個代碼使用了ASCII字符來繪制流星雨的效果。在游戲循環中，每次移動第一個流星，并重新繪制畫面。流星超過屏幕高度后會重新生成一個位置和速度。