read-wpm.js

const { readFileSync: readFile } = require('fs');

const file = readFile('path-to-file', 'utf8');
const WPM = 300;
const wordSpeed = wpm => 60000 / wpm;
const readText = (txt, wpm) => {
	const words = txt.split(/\s+/).map(item => item.trim().replace(',', ''))
	let i = 0;
	let int = setInterval(function() {
		console.clear();
		console.log();
		console.log(words[i]);
		console.log();
		console.log('-'.repeat(5));
		console.log(`${wpm} wpm | ${wpm/60} wps | 1 word each ${wordSpeed(wpm)}ms | ${i+1} words read of ${words.length}`);
		console.log();

		if ( i < words.length ) {
			i++;
		} else {
			clearInterval(int);
			
			setTimeout(() => {
				console.clear()
				console.log()
				console.log(`${wpm} wpm | ${wpm/60} wps | 1 word each ${wordSpeed(wpm)}ms  | ${i+1} words read of ${words.length}`);
			}, 500)
		}

	}, wordSpeed(wpm))
}

console.clear();
console.log('Your challenge will start in...');
setTimeout(() => {
	let timerCount = 3;
	let timer = setInterval(() => {
		console.clear();
		console.log();
		console.log(`${timerCount}...`);
		
		if ( timerCount === 0 ) {
			clearInterval(timer);
		} else {
			timerCount--;
		}
	}, 1000)

	setTimeout(() => {
		readText(file, WPM);
	}, 3000)
}, 500)