turn on a led

I have the arbotix robocontroller and here is a picture of the led that I putted on the digital port:

and i want to turn on this led what sould i write at arduino to do this?

Is this an Arduino clone ?

First have a look at the sticky http://arduino.cc/forum/index.php/topic,97455.0.html

and some notes about LEDs

Then look at the example for "blink" and work from there through the examples.