Does anyone know how to graph this phenomena on a computer? I graphed with dice how many rolls occur after a 7 before another 7 occurs. I understand that this may not work with computer generated numbers. The odds of 7 is 1 in six but this may be an additional way to predict the odds. The graph by hand showed that the probability after a seven of another 7 on the first roll is 1 in 9 and that proceeds to dip down to 1 in 3 on something like the 5th roll without a 7 and then proceeds exponentially up to approaching 100% after for example 100 rolls without a 7. At this point the dice become unpredictable.