Here's a quick example using
Stretchtext, a kind of hypertext, is basically a form of writing
closely related to other prose. It is read by a user or student from
a computer display screen. The user, or student, controls it, and
causes it to change, with throttles connected to the computer. Stretchtext
gets longer, by adding words and phrases, or shorter, by subtracting words
and phrases, on demand.
layers.