# Golapāda IV.36 — precession of the equinoxes (the ayana movement)
# The equinox point creeps westward along the ecliptic, ~1° every 72 years.
reset
view.outside
observer.city Ujjain
show.celestial-equator
show.ecliptic
show.ecliptic-seasons
show.ncp
show.nep
wait 1

overlay.show Marking the vernal point, then stepping the calendar by centuries
time.step-mode century
speed.real-time
repeat 26
  time.step.next
  overlay.show {date.year} — the vernal point drifts westward through the nakshatras
  wait 1
end
overlay.show Over ~25,800 years the celestial pole circles the ecliptic pole
wait 4
overlay.clear