Imagine a computer like a PDP-11 but with more than 3 billion SP4T switches. The switches are various combinations of 'magic' and 'more magic'

the authors of the code are dead, there are no comments except for old code, and sometimes the comments run anyway

and it's wet

this is biology.

Waaaayyyy fewer switches. But most are not deterministic and switch on your long-time-no-cleaning shower head (or not).
https://xkcd.com/1605/
DNA

xkcd