I claim the ornamental design for the square kinetic sculpture, as shown and described.
FIG. 1 is a top view of the square kinetic sculpture of FIG. 5 in a compressed mode (the bottom view being the same as the top view)(the outboard portion of the bisecting ribs, the ribs, the center and the bisecting channels and other interior surfaces shown in broken lines not being part of the design).
FIG. 2 is a front side view of the square kinetic sculpture of FIG. 5 in the compressed mode (the rear, right side and left side view being the same as the front side view)(the bisecting channels, and the center and ribs and other interior surfaces shown in broken lines not being part of the design).
FIG. 3 is a top view of the square kinetic sculpture of FIG. 5 in an expanded mode (the bottom view being the same as the top view)(the bisecting ribs, the center and the bisecting channels and other interior surfaces shown in broken lines not being part of the design).
FIG. 4 is a front side view of the square kinetic sculpture of FIG. 5 in the expanded mode (the rear, right side and left side view being the same as the front side view)(the bisecting channels and the other interior surfaces shown in broken lines not being part of the design); and,
FIG. 5 is a perspective view of the square kinetic sculpture in the compressed mode (the bisecting ribs and the bisecting channels and the other interior surfaces shown in broken lines not being part of the design).