A blue sky that has came to my mind a lot of times. It's not the sky outside, it's the sky exists in my childhood memory. On my way to school or back home, I liked to look up to watch the blue sky. It made me feel peaceful and happy. It's a big world which could hug me forever. All the bad moods disappeared all of a sudden when I saw the bule sky. The bule sky also liked listening to my langhter, because I remembered that it's always blue even in a rainy day. However, When I grew up , the sky always gave me a feeling that it's gray. I seldom look up to see the sky. I just remebered the rainy and windy days always made me to be hard to commute. I am sure that the sky was blue in most time , but It's definitely gray in my mind. In fact, I always look down at the sidewalk while walking to my office. I just want to finish all the things which stay on my busy schedules. So, good memories just belong to chidren! Luckly, a blue sky once belonged to me!