It locks some empty space in
    　　For many times
    　　It opens the space to us
    　　　 If I were a gust of wind
    　　　 I would not need it
    　　But now it's in the pocket of my left trouser leg
    　　No It's in the right pocket
    　　Clinking very late in the night
    　　Hush！ Be quiet
    　　Don't wake up the dreaming people in the room