How do you make your code knows you are progressing (snake and ladder) python

I want to make python snake and ladder, I have the dice already

    six_dice = random.randint(1, 6)
    return six_dice

i also make the map function already

    if number == 9:
        return "oops you got bitten by snake, you fell into", 4
    if number == 5:
        return "nice, you found a ladder and walk yourself up, you are now at", 15
    if number == 24:
        return "oh no! a snake bit your ankle, you fell into", 13
    if number == 12:
        return "just what you needed! you climb up a ladder and found yourself at", 21

But I'm still stuck on how do you make the game knows that you are progressing, not keep at the same 6 number. And second, how do you make the snake_map noticeable by the code