“Our public spaces are like our imaginaries; they only have meaning if shared with all." The installation Éloge de l'air explores this adage through movement and cooperation. All the pavilions generate a "visual and collective undulation", alternating perfect or random synchronization with the public. During the day, the installation is naturally punctuated by the sound of the air in the pavilions, the sound of halyards on the masts, and the play of shadow and light of the pavilions on the ground. At night, the experience is transformed into an interactive light fluctuation, the movement of the pendulums being captured to vary the lighting of the pavilions. Therefore, the entire experience is amplified and visible even from far away, in a 360°.