As opposed to a digital copy that is perfectly identical, this piece proposes to implement a "DUB" command in the computer as a modified copy, to generate an infinite number of versions of the software, and to upgrade it on the principle of competition for survival of living things. There are a series of face icons on the project's web page, and users can choose one they like and try the "DUB" command. After each DUB the face icon changes slightly, and the user can save their favorite one on the site for the next visitor to choose.The structure is like a combination of the ideas of KAO and BM394.