This video show how to give the command to turn ON and OFF the LED using the keyboard.
This guide is assuming that you have already read the Getting Started for Maker UNO and installed the Arduino IDE. If not, you can refer it here.
1. Open the Arduino IDE and paste the following code into the sketch
2. Plug in the Maker UNO and upload the code.
3. Refer to this post to setup the serial monitor.
4. Test yourself by changing the code to control brightness using serial monitor.