/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: grafikosi https://cdn.slidesharecdn.com/profile-photo-grafikosi-48x48.jpg?cb=1577455105 Our life is like a piano.The white keys represent happiness and the black keys represent sadness.But when the time goes on you realize that the black keys make music too and what comes out of it depends on how you play on it.