Maze generator with experimental Node command-line argument parsing

maze.mjs

#!/usr/bin/node

import { parseArgs } from 'node:util';

/*
	Based on the Commodore 64 single line maze generator
	10 PRINT CHR$(205.5+RND(1)); : GOTO 10
	as described at https://10print.org/
*/

const defaults = { char0: '\u2571', char1: '\u2572', delay: '50', };

const options = {
  char0: { type: 'string', short: '0', },
  char1: { type: 'string', short: '1', },
  delay: { type: 'string', short: 'd', }
};

const { values } = parseArgs({ options });

const char0 = values.char0 || defaults.char0;
const char1 = values.char1 || defaults.char1;
const delay = parseInt(values.delay || defaults.delay);

const sleep = (milliseconds) => new Promise((resolve) => setTimeout(resolve, milliseconds));

for(;;) {
  process.stdout.write(Math.random() < 0.5 ? char0 : char1);
  await sleep(delay);
}