save project

my_music.py

@@ -50,7 +50,14 @@ while True:
                     else:
                         play_button = play_img
                         pygame.mixer.music.pause()
-
+                if x>120 and x<220 and y>350 and y<400:
+                # 次数增加
+                    e-= 1
+                    if e < 0:
+                        e = len(k) - 1
+                    pygame.mixer.music.load(k[e])   
+                    pygame.mixer.music.play()
+                    pass
     if pygame.mixer.music.get_busy() == False:
         e+=1
         if e>len(k)-1: