TickCountdown.scala

def tickCountdown(): Game = {
    val countdownUpdated = TurnCountdownUpdated(id, turn.secondsLeft - 1)
    if (turn.secondsLeft <= 1) {
      val timedOut = TurnTimedOut(id)
      nextPlayerOpt match {
        case Some(nextPlayer) =>
          applyEvents(countdownUpdated, timedOut, TurnChanged(id, Turn(nextPlayer, turnTimeoutSeconds)))
        case None =>
          applyEvents(countdownUpdated, timedOut, GameFinished(id, bestPlayers))
      }
    } else applyEvent(countdownUpdated)
  }