save project

my_music.py

@@ -59,20 +59,30 @@ while True:
                         play_button = play_img
                         pygame.mixer.music.pause()
                 if x>120 and x<220 and y>350 and y<400:
-                    num-=-1
+                    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 x>420 and x<520 and y>350 and y<400:
+                    num+=1
+                    if num > len(music_list)-1:
+                        num=0
 
-    if pygame.mixer.music.get_busy() == False:
-        num +=1
-        if num>len(music_list)-1:
-            num=0
-        pygame.mixer.music.load(path+"\\"+music_list[num]) 
-        pygame.mixer.music.play()
+               
+                    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:
+                num=0
+            pygame.mixer.music.load(path+"\\"+music_list[num]) 
+            pygame.mixer.music.play()
 
     # 绘制画面
     screen.blit(bg_img, (0, 0))      # 填充背景