Conway's rule, read as conservation: a still life is a fixed point, an oscillator conserves its period, and a glider reprints its exact shape one step over — a discrete transformation that moves without deforming. The mark is phase 1 of a live glider, obeying B3/S23.
01 · Life emblems
still life · oscillator · spaceship
E1 · gliderphase 1 · shape-preserving
E2 · blockstill life · fixed point
E3 · blinkeroscillator · period 2
E4 · pulsaroscillator · period 3
E5 · spaceshipLWSS · translates
E6 · liverunning · glider loop
02 · Glider evolution
shape-preserving translation
t0
t1 ◂
t2
t3
t4
four generations · the glider returns to its exact shape, translated by (1, 1) — a unit unimodular step on the lattice. t1 is the chosen mark.
03 · One glider, sixteen faces
4 phases · 4 headings
Period — the 4 phases it cycles through
φ0
φ1
φ2
φ3
Heading — phase 1 aimed down each diagonal
SE
SW
NW
NE
one glider = 4 phases × 4 diagonal headings = 16 oriented images, all rotations/reflections of the same five cells. The chosen mark is φ1, heading SE.