# Chapter II: Introduction to Designing

> But ‘why then publish?’ There are no rewards
> Of fame or profit when the world grows weary.
> I ask in turn why do you play at cards?
> Why drink? Why read? To make some hour less dreary.
> It occupies me to turn back regards
> On what I've seen or pondered, sad or cheery,
> And what I write I cast upon the stream
> To swim or sink. I have had at least my dream.
> — Lord Byron (1788–1824), Don Juan, canto XIV

## §4 ‘Ruins’ begun

## §5 Introducing messages and classes

## §6 Actions and reactions

## §7 Infix and the debugging verbs