It sounds like you've got the beginnings of Machine Learning (classification & regression), but I'd still recommend checking out Coursera. The JHU Data Science series is good, but more geared towards DS than AI. There are others on there as well; if you're looking to get into deep learning, I echo the recommendation to check out Ng's course, though this might be good, too: https://www.coursera.org/course/neuralnets
Looks like there's code in different languages, so the arbitrary 500 line count gets even more hazy. As an extreme case, consider 500 lines of APL vs. Java.
