http://imanas.shanghai.nyu.edu/~cl4690/week2-css%20exercise-clover/index.html
I first change the headline part, to make the word in the middle. Then I change the position of the small boxes. Then I move the whole background of the small boxes above. Then I change the margin and the padding. Then I change the position of the root word. At last, I change the color of the background to make it looks good.