Originally, I was trying to create a random 4-digit code generator, but there's not enough room for all that. Note, this RNG is not truly random, but neither are most of them. This can be improved upon of course, but that would take up even more space than I really have here. A random code generator would have worked along the same principal, only it would remember the 1st digit generated, then using a counter and some more SR flip flops, it would remember the 2nd, 3rd, and 4th number as the counter determines how many times you've pressed the button, so that it could switch to the other displays at the correct time to show the previous numbers that were generated to form a random 4-digit code kinda like Google might do if you forget your password.
