The participants of this workshop, who can sign up as teams of two or three, will be offered a real carte blanche for their creation in terms of form, message and technique. Whether it is a poster or series of posters, a typeface, a pattern ( connected to industrial design) or textile (connected to fashion), a book or street art, the participants are free to choose. One sole restriction: the design must consist of two layers: the first one being the grid whose composition is based solely on the grid, and the second one being independent from these grid rules, a freestyle layer. The reflection will concern the interaction between art, design and communication, between organisation and unorganisation, and also on how to find freedom within this formal restriction.