A mobile supporting three spotlights and an electric fan hangs from the ceiling. The fan comes on at intervals to propel the mobile’s rotation; the spotlights project three circles of light onto the floor. A large, warm-hued, unmoving circle is orbited by two smaller, bluer circles. One of these steadily moves along the large circle’s outer edge, while the other traverses it less predictably.
|Fan, three spotlights, carbon tubes, sliding contacts, cables, wire|