Thank you very much. I am about to test out the program. So what does compiler refer to anyway? I see that word a lot and never know what it means. Also, when I was looking at the source code for the $50 robot and trying to understand it, I noticed it had function calls that I did not read about in my C programming book. Is it because they are specific to AVR Programmers and does every programmer have its own new set of function calls? Sorry for alll the questions. I am completely new at this.