THE LINE READS THE PLATE
Drag anywhere. The sighting line follows your finger and sounds whatever the skyline is doing beneath it — a cloud bank holds one note, a gap between clouds drops to the ridge behind it.
FOURTEEN PLATES · ONE SIGHTING LINE
Every skyline in this room was read out of its plate — ninety-six columns of pixels, traced by a flood fill from the sky. Drag the sighting line and the picture plays itself: cloud banks hold, blue gaps fall to the ridge.

CLOSED · PRESS THE PLATE TO OPEN
Drag anywhere. The sighting line follows your finger and sounds whatever the skyline is doing beneath it — a cloud bank holds one note, a gap between clouds drops to the ridge behind it.
No melody was written for this room. Each plate’s skyline was traced out of its own pixels and stored as ninety-six elevations, and that array is the score. The feet in the readout are the plate’s, not the Sierra’s.
Press RUN THE SURVEY and the line walks all fourteen plates in about two and a quarter minutes, from the green shoulder to the evening pines. Arrow keys step the line, brackets change plates, and nothing here is scored.