Works of art that use clocks or timers

Works of art that use clocks :
 * Felix Gonzales-Torres, Untitled (Perfect Lovers)(1991)
 * Ralph Steiner, Eight O'Clock Coffee (1935)
 * On Kawara, One Million Years (Past and Future) (1970-present)
 * Tatsuo Miyajima, Clock for 300 Thousand Years (1987), Counter Ground (1998-2000)