Seven mirrors randomly deployed on a zig-zagging spine configure the object. The seven faces are a thought, an intuition and, as such, something never definitive, always unfinished... In order to be able to define themselves, they need a place to reflect and thus to inhabit. In contrast, at the spine everything is terminated, constructed... There everything is definitive and conclusive. Intentionally, a part of this spine is left exposed to view in order to give a few clues as to the laws governing its construction.