Explanation

Simulates the 4-state busy beaver - a computer theoretical Turing machine that writes as much non-blank on its tape as possible.

en.wikipedia.org/wiki/Busy_beaver

Requirements

You can install a web browser that supports at least JavaScript 1.0 (1995) to use this tool or you may consider implementing a GemiWeb0 browser with JavaScript0 yourself according to the following specification:

bkil.gitlab.io/gemiweb0