save project

my_music.py

@@ -51,13 +51,22 @@ while True:
                     else:
                         play_button = play_img
                         pygame.mixer.music.pause()
-
+                if x>120 and x<220 and y>350 and y<400:
+                    num -= 1
+                    if num < 0:
+                        num = len(filelist) - 1
+                    pygame.mixer.music.load(filelist[num])
+                    pygame.mixer.music.play()
+                    click = 0
+                    play_button = stop_img
+                        
     if pygame.mixer.music.get_busy() == False:
         num += 1
         if num>len(filelist)-1:
             num=0
         pygame.mixer.music.load(filelist[num])
         pygame.mixer.music.play()
+        
 
 
     # 绘制画面