From the Sosolimited writeup:
The sculpture celebrates the organic beauty of collaboration by visualizing the movements of an invisible flock of birds. Four hundred folding elements form a hanging volume in the sunlit atrium. Each element can independently open and close, controlled by custom software running a flocking algorithm.
The movements of the sculpture are perpetually evolving, driven by the flocking simulation. Over the course of each hour, smaller groups of birds coalesce into a single entity, soaring through the air in fluid collaboration. At each quarter hour, the birds gather and perform special choreographed gestures across the sculpture.
View Sosolimited’s documentation of Diffusion Choir.