save project

my_music.py

@@ -56,6 +56,22 @@ while True:
                     else:
                         play_button = play_img
                         pygame.mixer.music.pause()
+                if x >120 and x <220 and y >350 and y <450:
+                    num-=1
+                    if num<-1:
+                        num=len(mlist)-1
+                    pygame.mixer.music.load(mlist[num])
+                    pygame.mixer.music.play()
+                    click=0
+                    play_button=stop_img
+                if x >420 and x <520 and y >350 and y <450:
+                    num+=1
+                    if num>=len(mlist):
+                        num=0
+                    pygame.mixer.music.load(mlist[num])
+                    pygame.mixer.music.play()
+                    click=0
+                    play_button=stop_img
 
     if pygame.mixer.music.get_busy() == False:
         num+=1
@@ -63,7 +79,7 @@ while True:
             num=-1
         pygame.mixer.music.load(mlist[num])
         pygame.mixer.music.play()
-
+            
     # 绘制画面
     screen.blit(bg_img, (0, 0))      # 填充背景
     screen.blit(play_button, (270, 330))   # 暂停按钮