It is a Hotshot custom to begin learning anything new with a Hello World example. Since we will be doing really cool things in this book, we will say "Hello World" in a unique fashion. In this project, we will use the Raspberry Pi to cause an LED light to blink. This project is directed towards those who are relatively new to the Raspberry Pi environment as a warm-up exercise. Feel free to skip ahead if you have already done this with your Pi, though we suggest you look through and make sure you haven't missed anything.