Link: http://imanas.shanghai.nyu.edu/~ys3041/homework/cat.html
For this exercise, I learn how to swap the elements in the html. It is not hard to change the elements like the picture. While, many things should be care when I am trying to change the style in the java script. I was struggling with changing the font-size and border color. I failed a lot of time and finally I found the correct way. This experience and exercise is pretty helpful and useful.