you essentially write code to set up your Arduino for a specific tasks or tasks, then run a continuous loop which gets called repeatedly by the Arduino microcontroller once your Sketch is uploaded ...

void Program::run() { for (;;) { // program code here checkSerialInput(); } } The function initArduino() is inlined and handles the two initialization routines required to setup the Arduino ...

Open the Arduino software and paste the Arduino code (the text in the box near the bottom of the post) into a new sketch. Click Sketch > Verify / Compile to make sure the code is properly in there.