The syllable

A · U · M sounded through the whole mouth, from open throat to closed lips — and then the sound stops with time still on the clock, and turīya appears as the silence that is left. Toggle the 42-Name's eighth line, which this app already draws as silence.

The best single model on the door, because the doctrine is enacted rather than depicted. Nothing is drawn for the fourth. The absence of a drawing is the drawing.