Study the 2.1 Intro to Synthesis and 2.2 Programming Tutorials. They will help you understand how the code in 2.3 Composing Process Tutorial works. Extend the code in the 2.3 Tutorial using UGens that interest you found in the Tour of the UGens and other help-files. Chapter 2 in Gentle Introduction to SuperCollider will provides and introduction to the Pattern library for sequencing. Use examples from this chapter in composing Pdefs that you combine into a short composition to play in class next week!