save project

my_music.py

@@ -29,6 +29,7 @@ while True:
                 a-=0.1
                 if a<1:
                     a=0
+            pygame.mixer.music.set_volume(a)
     if pygame.mixer.music.get_busy()==False:
         pygame.mixer.misic.play()
     # 绘制画面