# GOL-031: Orbital Bloom

Travelers align nearby headings, reproduce behind their shared direction, and die by local crowding. Freedom to move can protect life.

[Open simulation](https://100gol.com/experiments/031) · [Directory](https://100gol.com/experiments)

## What to explore

Keep GOL-030's literal steering and blocked movement while exploring renewal,
trails, moving growth fronts and crowded attrition. Birth and death must be local,
deterministic and separately switchable, with no hidden population target.

## Rules, update order and replay

The 80/120/160 square world wraps by default; bounded edges are optional. An
occupied site holds one organism with an eight-way heading. Initialization and
painting use independent field/heading seeds and persistent site RNG streams.
Steering is GOL-030's unit-vector blend with Euclidean weight max(1,R-d)/R inside
radius R, strength-scaled capped total influence, nearest-eight quantization and
old-heading retention on cancellation/ties. Movement uses 1–4 synchronous
microsteps: occupied destinations (even departing), edges and contested empty
destinations block. A block ends that organism's movement for this Step.

One Step freezes occupancy/headings and counts each organism's eight immediate
Moore neighbors, excluding itself. It plans steering and all movement unchanged.
Death matches strictly deathAbove < count < deathBelow. With protection enabled,
at least one accepted microstep vetoes death, including a later-blocked stride.
Deaths commit after planning movement; they do not free a path within this Step.

Each surviving organism matching birthAbove < count < birthBelow may create at
most one child. Its group is itself plus all original adjacent living neighbors;
their newly steered unit headings vote equally. Quantization uses the focal
parent's new heading on cancellation/ties. The child inherits that combined
heading. Candidates are the eight sites around the parent's ORIGINAL position,
starting opposite the combined heading then proceeding in the chosen sense.
Candidates must be originally empty and unused by ANY accepted movement
microstep, even one belonging to a doomed organism. Thus no birth intercepts a
moving cell or fills a newly vacated location. Deaths do not recursively alter
neighbor counts or group votes. Each parent proposes its best remaining free
candidate. Unique claims succeed together; tied claimants retry their next
candidate in subsequent synchronous rounds (at most eight). A contested site
is not permanently poisoned. No coordinate or iteration-order winner exists.
Newborns begin acting next Step. Separate neighboring parents may each reproduce;
there are no global group identities or pair deduplication.

Reset reconstructs every array, generation and evidence from the chosen field
and both seeds. Rules/topology edits pause, preserve occupants/headings/streams
and clear evidence. Complete replay includes occupancy, headings, site streams,
movement evidence, carried Moore/death-protection evidence, birth parent and
site-based death evidence. No evolution randomness is introduced.

## Reading the simulation

Heading colors/arrows retain GOL-030's meaning. Optional lifecycle marks identify
newborns and last-Step deaths, with text equivalents. Paused inspection reports
Moore count, strict interval matches, movement protection, combined heading,
ranked birth candidates and exact accepted result, alongside orbital contributions
and carried previous evidence. Empty sites explain incoming births/deaths too.
Cream outlines mark births; coral crosses mark death at the planned endpoint.
Yellow squares identify Moore positions; dashed cyan marks orbit contributions.
Moved/turned telemetry counts original organisms, including those that subsequently
die. No running field-wide numeric report appears in the context rail.

## Reproduce a starting configuration

[Download example JSON](https://100gol.com/api/experiments/031/configuration). Import it using Share & reproduce in the simulation controls. It starts paused at Step zero. Files contain rules and initial conditions, not evolved boards or manual edits. See [format, limitations and automated access](https://100gol.com/agents).