Quite rough at the moment.
Create a rule titled 'Making Wagers' with the following text:
A Wager MAY be offered by any player by announcement.
To be a valid the Wager announcement MUST contain the following:
(a) A statement that is, or will become, true or false,
(b) The number and color of Marks being wagered, which MUST be
less than or equal to the number of Marks possessed by that
player, and
(c) The outcome wagered on by the offering player.
A player with less than the number of Marks being wagered CAN NOT
accept a Wager. Any other player MAY accept the wager by
announcement. Only one player CAN accept each wager.
Create a rule titled 'Resolving Wagers' with the following text:
A Wager MAY be resolved when the following conditions are met:
(a) The Wager has been accepted, and
(b) The statement that is the subject of the Wager is either
true or false.
A Wager is resolved by announcment and indicates the result of
the Wager.
As soon as possible after a Wager is resolved the player who lost
the Wager MUST transfer the aggreed number of Marks to the winner
of the Wager.
Levi