[REQUEST] Probability of an All Red Board Twice in a Row in Texas Hold'em

I was playing poker the other day, and the board was all red twice in a row, and then it got me thinking. What are the odds a board is all red (my guess is it is the probability of 5 random cards showing up red but I am not great at knowing the best formula to figure these things out)? And then how do you determine the odds of that happening 2 times in a row?