let red = document.querySelector('.red'),
	yellow = document.querySelector('.yellow'),
	green = document.querySelector('.green'),
	btn = document.querySelector('.butn'),
	counter = document.querySelector('.counter');

let shwCounts,timerss,startTime = true;

const doo=ms=>new Promise(ok=>setTimeout(()=> ok(ms),ms));
				
let low = ms => new Promise(function(res){
    btn.onclick = () => {
		buttonClick();
		clearTimeout(timerss);
	}
	timerss=setTimeout(()=>res(),ms);
	function buttonClick(){
		setTimeout(() => res(),4000);
	};
});

let redTimer = 6000,
    yellowTimer = 2000,
    greenTimer = 8000;
						
async function trafficLight(){
	while (true){
		shw(parseInt(redTimer));
		yellow.classList.remove('burn-yellow');
		red.classList.add('burn-red');
		await doo(redTimer);
		
		shw(parseInt(yellowTimer));
		red.classList.remove('burn-red');
		yellow.classList.add('burn-yellow');
		await doo(yellowTimer);
		
		shw(parseInt(greenTimer));
		yellow.classList.remove('burn-yellow');
		green.classList.add('burn-green');
		await Promise.race([doo(greenTimer),low(greenTimer+1000)]);
		
		clearTimeout(shwCounts);
		counter.innerText = parseInt(yellowTimer/1000);
		
		shw(parseInt(yellowTimer));
		green.classList.remove('burn-green');
		yellow.classList.add('burn-yellow');
		await doo(yellowTimer);
	};
};
trafficLight();

function shw(time) {
    if (startTime){
        counter.innerText = time/1000;
        startTime = false
    }
    time -= 1000;
    if (time ==  0){
        startTime = true;
        return;
    }
    shwCounts = setTimeout(()=>{
        counter.innerText = time/1000;
        shw(time);
    },1000);   
}

async function speedTest(promis,cnt=1,paraller=1){
	let prll = paraller, obj = {}, fdr = 0;;
	function prllStart(){
		if (paraller === 1){
			paraller = prll;
			return(promis());
		}else{
			paraller--;
			prllStart();
			return(promis());
		}
	}
	let run = performance.now();
	for (let i=0; i<cnt ; i++){
		let a = performance.now();
		await Promise.all([prllStart()]);
		fdr += performance.now() - a;
	}
	obj.summParaller = paraller + ' пралельных процессов'
	obj.lasting = performance.now() - run; 
	obj.parallerLasting = fdr / cnt;
	obj.parallerSpeed = paraller / (obj.parallerLasting);
	obj.durationLasting = parseInt(obj.parallerLasting) + 'ms'
	obj.requestSpeed='нет отличия'
	return obj;
}

speedTest(()=>doo(1000),10,100).then(result=>console.log(result));
speedTest(()=>fetch('http://swapi.dev/api/people/1').then(res=>res.json()),10,5).then(result=>console.log(result));