// how a field runs

1. Light. 0.004 ETH lights one box, one per wallet per field, holders of 10,000 $LASTBOX. Twelve boxes to a field; boxes are numbered in the order they are lit.
2. Knockout. When the field's clock runs out, or the twelfth box is lit, lighting shuts. Every beat one lit box goes dark. The beat call fixes a block four blocks ahead; once it exists, its hash picks the box: keccak256(hash, field, beat) mod lit boxes. Nobody chooses it, the house included.
3. Last lit. When one box is left lit, it takes every dark box's stake less a tenth to the house, plus its own 0.004 back. Claim it any time. Fewer than two boxes and the clock simply runs again; your box stays lit.

ten boxes lit at 0.004 ........ 0.040
nine go dark, one per beat .... 0.036 in the dark
house keeps a tenth ........... 0.0036
last box lit takes ............ 0.0324 + its own 0.004
                                = 0.0364