save project

my_music.py

@@ -60,11 +60,23 @@ while True:
                 if x > 120 and x< 220 and y > 350 and y < 400:
                     a-=1
                     if a<0:
-                        a=len(p)
+                        a=len(p)-1
+                    pygame.mixer.music.load(path+'\\'+p[a])
+                    pygame.mixer.music.play()
+                    click=2
+                    play_button = stop_img
+                if x > 420 and x< 520 and y > 350 and y < 400:
+                    a+=1
+                    if a>len(p)-1:
+                        a=0
+                    pygame.mixer.music.load(path+'\\'+p[a])
+                    pygame.mixer.music.play()
+                    click=2
+                    play_button = stop_img
     if pygame.mixer.music.get_busy() == False:
         a+=1
-        if a > len(p)-1:
-         click=2   
+        if a > len(p)-1: 
+            a=0 
         pygame.mixer.music.load(path+'\\'+p[a])
         pygame.mixer.music.play()
         # 绘制画面,       # 填充背景