Olafur Eliasson «Your Space Embracer» 2004.

Your space embracer, 2004
A harsh beam of light was directed to shine through a dangling mirrored ring. As the ring turned, a halo of light traveled in a slow-motion promenade across walls and ceiling. Seeming to encompass the space, the circular light morphed into a rectilinear shape as it traversed the room's angular corner.
Space Embracer from 2004 continues to manipulate and alter light, albeit on a less immersive scale. It uses stage spotlights to beam light through spinning acrylic rings that refract wildly geometric imagery throughout the room. The light directly at the center of the projection forms a perpetually undulating eye of shifting circular color, away from the center, spiraling lines of light blaze sleek designs across the walls.
Interview in the exhibition
Surroundings Surrounded, 2003
(3:56, language: german)
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japantoday.com, olafureliasson.net