Exercises three and four go together. The first part (#3) is to build something that has four different interaction behaviors, modes, or “states”. You can build and demonstrate the behaviors separately, they don’t need to work together at one time. The second part (#4) is to link them together with “transitions” that, when triggered, move the object from one state or behavior mode to another. The details of these two exercises are explained in the PDF here:
Part One (Exercise 3) Due Sept 18 (Tuesday) at midnight.
Part Two (Exercise 4) Due Sept 25 (Tuesday) at midnight.