save project

my_music.py

@@ -67,7 +67,7 @@ while True:
                     play_button = stop_img
                 if x>420 and x<520 and y>350 and y<400:
                     n+=1
-                    if n>len(m_l):
+                    if n>len(m_l)-1:
                         n=0
                     pygame.mixer.music.load(path+'\\'+m_l[n])
                     pygame.mixer.music.play()