save project

my_music.py

@@ -41,7 +41,7 @@ while True:
         if event.type == locals.MOUSEBUTTONDOWN:
             if event.button==1:
                 x,y=event.pos
-                if x>270 and x<370
+                if x>270 and x<370 and y > 350 and y <450:
                 # 次数增加                
                     click += 1
                     if click % 2 == 0:
@@ -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:
+                    num-=1
+                    if num<0:
+                        num=len(music_list)-1
+                    pygame.mixer.music.load(path+"\\"+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)-1: