First shown in Athens, the Walls investigated both bold and subtle variations of almost "syntactical" relationships between the neon forms "drawn" on the colored surfaces. Two 1973 Rooms allowed simultaneous formal engagement with interior and exterior architectural spaces. In both, making the entire interior a single unit fulfilled Antonakos's hope of including the viewer within the space of the art. San Francisco Room was exhibited inside the Museum of Art. The Room, placed outdoors in downtown Grand Rapids, offered more viewing options from greater distances, rooftops and, very importantly, with exposure to the daily 24-hour cycle of natural light. 1974, Outdoor Neons for the Fort Worth Art Museum upped the ante further with enormously greater scale and geometric diversity. This was nourishment for Antonakos's central concerns uniting light, form, and time throughout his future Public Works.