We interacted with the interior of the building with the projection of an evolving program of images on the façade (videomapping) as well as on the buildings around the square. We took control of the existing lighting, including five large chandeliers and several projectors installed inside the building. For the event, Yann Toma contacted all the inhabitants of the periphery of the belfry of Montrouge to distribute modules with a programmable bulb which diffuses a light to the rhythm of a Morse code chosen by each inhabitant.
Thus we immersed the spectator in an environment where all the buildings of the square were interacting.
To make the first tests of interaction and videomapping, we built on the spot a model of the facade and the belfry at the scale 1/20th.