Blinking 'L'

Hi there!

My Arduino is blinking an ‘L’ LED. It’s orange, above the TX and RX LEDs.
What does this mean?

Thanks!

That LED is user controllable on digital pin 13. When your ardunio is new, it comes pre-installed with a sketch to blink that LED to show the board is working.

Oh yeeeah! I remember now. Thanks so much! ;D