I found the upper part of this picture while I roamed on Flikr. I thought it was interesting because it was an upside-down picture. Maybe it could create some interesting visual effects. So I chose it.
The lower part of this picture is just a bedroom. The picture is a little dark so it might create a contrast to the former picture. The meaning of this combination of pictures is that when people sleep on a bed, their thoughts would fly everywhere. Even though the bedroom is tiny and dark, their dream is big and bright.
The difficult part of creating this photo is that it was my first time using Pixlr and I had a hard time learning how to crop, resize and combine. Later I googled it and finally solved the problem.