But, be careful, and think very much if it's really imprescindible to use a loop for the task you want to accomplish. I used a loop in Fred for a task that could be done even better just with events, no loop at all. It caused me a lot of pain & bugs until I finally came to the way of doing it with events instead of loops. So first think about other options, and finally, if you think there's no other way, use loops. But as Mnemonic said, the sleep time is what really makes the difference.