save project

my_music.py

@@ -50,10 +50,25 @@ while True:
                         else:
                             pygame.mixer.music.pause()
                             play_button=play_img
-                    if x>270 and x<370 and y>350 and y<450:
+                    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(music_list[num])
+                        pygame.mixer.music.play()
+                        click=0
+                        play_button=stop_img
+                    if x>420 and x<520 and y>350 and y<400:
+                        num+=1
+                        if num>len(music_list)-1:
+                            num=0
+                        pygame.mixer.music.load(music_list[num])
+                        pygame.mixer.music.play()
+                        click=0
+                        play_button=stop_img
     if pygame.mixer.music.get_busy()==False:
         num+=1
-        if num>len(music_list[num])-1:
+        if num>len(music_list)-1:
             num=0
         pygame.mixer.music.load(path+"//"+music_list[num])
         pygame.mixer.music.play()