During the 2019 lockdown, my twin sister and I were in the same space: my sister improvised on the piano and looked for interesting sounds, while I came up with ideas and sketched drawings for new projects. A third artist, Alexandra Surgan (delegated performer), made sketches of both of us. Alexandra was not only a collaborator, but also, she acted as a person, who documented the performance. Each of the girls was a participant in a joint study. My sister and I are like two units for whom the most comfortable state is to be together. The depiction of both of us in each of the sketches as something integral was fundamentally important. The purpose of performance documentation is to ask the following questions: Will we be depicted as similar to each other? Will we be different? Will we look like each other, but not ourselves in real life? Most often, at an exhibition, we see the result of the work of artists. This project highlights something that often remains unseen and captures only the process of creation of ideas, but not the result. The work consists of two parts - the documentation of the performance in form of sketches and its reenactment, which took place with the participation of the audience, which also made sketches of me and my sister a week after opening. The project covers several topics: the process of creation; interaction between sisters; the possibility or impossibility of artists to convey the difference / uniformity of us.