Abstract: The apparatus allows a display simulating a room or other object on a television-type display. Each segment of the room can be displayed in any desired color.In one embodiment, a number of colors can be defined by respective color composer circuits as R,B,G signals on buses. Given colors are assigned to given areas of the display by selectors. The R,B,G signals thus defined are gated to the display by a gating unit. The control inputs to the gating unit are controlled by segment generating hardware to define the desired segments of the display on the screen.