I would like to run two random number generators (RNG) in the same vi. The first RNG would run the entire time the vi is running. But, I would like to be able to control the second RNG (turn in on and off at will). I am envisioning start and stop buttons wired to the while loop to control the RNG; I have tried a few different setups, but none work so far. I have included a simple vi with the start and stop buttons. I am just not sure how to accomplish my goal with them. Thanks for your help.