t is the assembly of these classes and a geometrical experiment on the colors that led to the creation of the school. Small studying models of 1/1000 allowed us to manipulate the shape according to the colors which compose it, these corresponding in the various parts of the school (administration, toilets, green spaces, motricity room, classes). Thus we worked on a square base that welcomed a circulation giving sometimes onto an inside sometimes on an outside, creating relations between both.