A Tinker’s Trade - Lauren Ipsum: A Story About Computer Science and Other Improbable Things - page 27

Go forward one inch,
make a mark,
repeat five times.
Then he wound up the turtle and placed it on the poem. It went zzzrbt bzzaap whuzzzsh , and
so on. Then it drew a line of dots, just like the poem said:
“You see? If you put little ideas together, you can make bigger ones,” Tinker said. “And you
can compose those ideas into even bigger and bigger ones.”
“How do you do that?” asked Laurie.
“By giving them a name. You can use the name like a handle: you'd carry a pot of soup by
the handle, and you can move around an entire idea just by writing its name. Here, let's call
the first idea LINE . Then you can put four lines together to make a square.”
LINE :
Go forward one inch,
make a mark,
repeat five times.
SQUARE :
Make a LINE ,
Make a right turn,
repeat four times.
Make a SQUARE .
The little turtle zzzrbt ed and whuzzzsh ed and bzzaap ed, then drew this: