Is the Sparkfun RedBoard pre-loaded with a blink sketch? As soon as I plugged my brand new RedBoard (Sparkfun's Uno) into my computer, I saw the onboard LED (for pin 13) blink on and off every 1 second. This was before I even sent the first demo sketch to blink the LED. After I uploaded a sketch to change the blink time, the LED's blink cycle changed as I expected. 

But why was the LED blinking before I sent my very first sketch? Is the RedBoard pre-loaded with a sketch?
Yes, the RedBoard is preloaded with the blink sketch (or at least the two that I've purchased have been).