O Sistema arises from a didactic and artistic project of C.E.I.P Fogar de Carballo (Primary school). The center aims to turn the walls into another support for students to learn through art and at the same time to introduce the project Derrubando Muros con Pintura to the school. The theme of this first mural is the Solar System, which will be followed by other interventions on human evolution or the environment. The response of the students to the initiative was very good, so the artist decided to participate by painting a small wall in front of this one with a theme chosen by the students (the result was extraterrestrial). According to Emi, it is very important in urban art to create dialogue with the public, this project is becoming more understood and respected and we must also add a didactic purpose. This artwork was part of Derrubando muros con pintura 2017.