There is no way to consistently roll 6s on a dice. No matter how you slice it (unless you use loaded dice, which, why would you?), you always have only a 1/6 chance of rolling a 6.
I put 2 and 1 in my name the VERY first time I used this username, and then put a random amount of 0s behind each number. That's how it's been ever since.
I would use black ink, as it is the easiest to distinguish from the white paper. I would spill orange juice on it. Because orange juice is quite delectable.