class Spillebrett:
    def __init__ (self, rader, kolonner):
        self._rader=rader
        self._kolonner=kolonner
        self._rutenett=[[]]

    def generer(self):
        for i in range(self._rader):
            for j in range(self._kolonner):
                rand=randint(0,3)
                if rand==3:
                    self._rutenett[i][j].settLevende()