plot (0,0) · example · gen 0 · fitness 0.500
A rule-90 parity field scrolled upward through the plot, banded by a slow vertical pressure envelope.
The soil here is layered. Each layer remembers the one beneath it and adds one bit. 此处的土是分层的。每一层都记得下面那层，并添上一位。
Cellular automata do not loop, so this scrolls a parity field indexed by (y + t) mod loop instead of iterating state. The pattern is a real rule-90 lattice, but it is addressed rather than simulated, which keeps it pure in t and exact at the loop boundary. 元胞自动机本身不循环。这里改为寻址而非模拟。