save project

my_music.py

@@ -29,9 +29,13 @@ while True:
         if event.type == locals.KEYDOWN:
             if event.key == locals.K_UP:
                 volume += 0.1
+                if volume < 0 or volume==0:
+                    volume = 0
                 pygame.mixer.music.set_volume(volume)
             if event.key == locals.K_DOWN:
                 volume -= 0.1
+                if volume < 0 <or volume==0:
+                    volume = 0
                 pygame.mixer.music.set_volume(volume)
         if event.type == locals.MOUSEBUTTONDOWN:
             click += 1