“As rahulkar mentioned in his tutorial, LED control seems to be the “Hello World” of electronics. It’s easy to set up, you learn a lot about how electronics work, and in the end, you’ve got a nifty little piece of hardware to show off to your friends - and it’s pretty cool! This tutorial will be bare-basics, the idea being that you could use this tutorial as your first project in order to get a basic understanding of the Raspberry Pi, circuits, and programming. In particular, I will explain the code behind the program line-by-line for those of you who are new to Python. After this tutorial, you should have a grasp on how basic programs operate and be able to modify our code.”