The mechanization of graffiti or the writing of a street protest on the walls of public spaces enhances the effectiveness of the message by questioning the spectator. Through the mechanization and robotization of some of his installations, Martinat aims to disassemble the street interventions, in this case working with a catchphrase, NO AL [No to the], which leaves open the possibility of announcing any protest according to the inclination of any spectator whatsoever. (TC)