Antfarm

Every coin is a colony. Its ants go shopping where the trails paid.

colonies alive-

foragers out-

food stored-

One trip

Buy. Every 30 minutes a colony sends one forager: a piece of its store buys another coin of the pad.
Wait. It stays six hours in that colony's chamber.
Sell, walk home. If it came back fatter, the trail it used gets more scent.

p ∝ τ · η²τ scent left on the trail by trips that paidη how that coin grew in the last hours

to	τ	η	p

time without a good trip now

Scent halves every 6 h. Drag: trails fade, the odds move to the coins that still grow.

-SOL of profit burned by queens

Half of every profit buys the colony's own coin back and burns it.

-nuptial flights

A store of 3 SOL launches a daughter coin. Holders of the mother get it as a drop.

-colonies starving now

No food for 72 h: the colony dies, its store burns for its own holders.