Hey, that rhymes even! :P Lesson 4 is now out. Decision-making and repeating instructions are on the agenda for this one, expanding the repetoire of basic skills for writing code. Learning to Program With Haiku, Lesson 4.
This is a companion discussion topic for the original entry at https://www.haiku-os.org/blog/darkwyrm/2010-02-06_lesson_4_if_and_not_or/