Towers of Hanoi

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Evening came.

And morning came.

The first day.

The second day.

Fast forward to 1992.

The third day.

In the beginning, God created heaven and earth.

Now the earth was a formless void.

There was a darkness over the deep, with a divine wind sweeping over the waters.

God said, Let there be light.

And there was light.

And so it was.

God said, Let there be a vault through the middle of the waters to divide the waters in two.

God said, Let the waters under heaven come together into a single mass.

And let dry land appear.

God said, Let the earth produce vegetation:
seed-bearing plants, and fruit trees on earth,
bearing fruit with their seeds inside,
each corresponding to its own species.

Let’s look first at a neat little puzzle called the Tower of Hanoi,
invented by the French mathematician Edouard Lucas in 1883.

— GRAHAM, KNUTH, PATASHNIK,
Concrete Mathematics: A Foundation for Computer Science
(Eighth printing, with corrections, October 1992)