[Haskell-cafe] Timing in atom -- how consistent?

I'm working with Atom to program an ATtiny25. I am curious about how consistent the timings actually are. Consider John Van Enk' example of blinking a LED on an Arduino: http://code.sw17ch.com/blog/atom/blink_atom.c We see that sometimes `setLED' is executed and sometimes not. When `__clock' is incremented, it will be incremented sometimes sooner, sometimes later. Also, I am a little puzzled by the `__coverage` variable. What does it do? As for my project/motivation -- I'm just trying to blink a little LED on much less robust/rich kit -- the Trippy RGB Waves kit from Lady Ada. I am (gratuitously) exploring ways to program it with Haskell. -- Jason Dusek