save project

db.py

@@ -49,6 +49,14 @@ while True:
                 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(music_list) -1
+            pygame.mixer.music.load(path+"\\"+music_list[num])
+            pygame.mixer.music.play()
+            play_nutton = stop_img
+            clixk = 0
 
     if pygame.mixer.music.get_busy() == False：
         num += 1