The length of the mirrors and their distance from the cameras are such that each of the opposing mirrors reflects the opposite side (half) of the enclosing room (and also the reflection of an observer within the Area who is viewing the monitor/mirror image.)
    The camera sees and tapes this mirror’s view.
    Each of the videotaped camera views continuously is displayed 5 seconds later, appearing on the monitor of the opposite Area.
    Mirror A reflects the present surroundings and the delayed image projected on Monitor A.  Monitor A shows Mirror B 5 seconds ago, the opposite side’s view of Area A.  Similarly, Mirror A contains the opposite side’s view of Area B.
    A spectator in Area A (or Area B) looking in the direction of the mirror sees: 1) a continuous present-time reflection of his surrounding space, 2) himself as observer, 3) on the reflected monitor image 5 seconds past, his Area as seen by the mirror of the opposite Area.
    A spectator in Area A turned to face Monitor A will see both the reflection of Area A as it appeared in Mirror B 5 seconds earlier, and on a reduced scale, Area A reflected in Mirror B now.¹  

Dan Graham’s description of his mirror installation piece, Opposing Mirrors and Video Monitors On Time Delay (1974) reads like the TV direction for Siegfried and Roy’s eight-minute multiple illusion farewell performance.  The experience of this piece, as well as Graham’s other, mirrored wall and video installations on view at MOCA’s 40-year Graham survey, is somewhat more akin to entering my local (Chase) WaMu bank with its labyrinth of smoked glass chambers and gauntlet of security cameras one must pass through in order to pay your credit card or make a deposit.  In Graham’s impractical and much more amusing version, cowed customers standing on-line have been replaced with gleeful museum visitors running from room to room, waving at themselves on closed circuit TV.  Mirrored walls reflect viewers’ surroundings and themselves while a television monitor shows what has just occurred in the space––recorded seconds earlier as seen from the opposite monitor.

_{1. Graham, Dan, Video – Architecture – Television: Writings on Video and Video Works 1970-1979}