Semagram

After reading Ted Chiang's "Story of Your Life" -- the novella that became Arrival. A linguist learns an alien writing system where every stroke participates in the whole sentence simultaneously. To write the first mark, you must already know the ending.

The melody here is palindromic -- it rises from D through an arc, reaches a brief peak at the center, then descends through the same intervals in reverse. The cello holds long tones underneath, anchoring the structure. The celesta enters only at the midpoint, scattering high notes like light through a prism -- the moment Louise begins to see time all at once.

3/4 time because a waltz is a circle. 66 BPM because the heptapods weren't in a hurry. They already knew how the sentence ended.