A great nature scene seems to hypnotize people for a long time. Thus, people can feel beauty of nature. Why do we feel nature's beauty? Because we must share the basic structure in our mind. This art work is a virtual space to explore it. People connect to a world as a "Particle" where they may enjoy chatting with other particles. After disconnecting, their remnant particle behaves individually with other particles reflecting activity by all who have ever connected. Accordingly, if those anonymous activities make beautiful images like "clustering fireflies", there would be the basic structure of beauty.