Intention: Personally, I would change my profile pictures if something important happens to me. For example, I will change my profile pictures to some “blue” mode object when I am extremely sad; I will change it to my happy selfie if I am extremely happy. So, in this project, I want to see wether other people will do the same thing. If they do, what kind of pictures would they change to fit their mood? Do people also choice different pictures to fit the same mood? If they do not behave the same as I do, so what are the patterns for them to change the profile pictures. I would use their Facebook timeline to exam the patterns.