save project

my_music.py

@@ -51,7 +51,14 @@ while True:
                     else:
                     else:
                         play_button = play_img
                         play_button = play_img
                         pygame.mixer.music.pause()
                         pygame.mixer.music.pause()
-
+                if x>120 and x<220 and y>350 and y<400:
+                    num-=1
+                    if num < 0:
+                        num=len(a)-1
+                    pygame.mixer.music.load(a[num])
+                    pygame.mixer.music.play()
+                    click=0
+                    play_button=stop_img
     if pygame.mixer.music.get_busy() == False:
     if pygame.mixer.music.get_busy() == False:
         num += 1
         num += 1
         if num > len(a)-1:
         if num > len(a)-1: