how to make a css clock

JavaScript
// and now you have a clock
<html>
<head>
	<meta charset="UTF-8">
	<title>Clock</title>
	<script language="Javascript" type="text/Javascript" src="libraries/p5.js"></script>
	<link rel="stylesheet" type="text/css" href="style.css">	
		<style> body {padding: 0; margin: 0;} </style>
</head>
<body>
	<div class="clock">
		<div class="hour">
			<div class="hr" id="hr"></div>
		</div>
		<div class="min">
			<div class="mn" id="mn"></div>
		</div>
		<div class="sec">
			<div class="sc" id="sc"></div>
		</div>
	</div>
	<script type="text/javascript">
      // first for css you need to go to online tutorials channel and download the image and put it in your folder
		const deg = 6;
		const hr = document.querySelector('#hr');

		const mn = document.querySelector('#mn');

		const sc = document.querySelector('#sc');


		setInterval(() => {



		let day = new Date();
		let hh = day.getHours() * 30;
		let mm = day.getMinutes() * deg;
		let ss = day.getSeconds() * deg;



		hr.style.transform = hr.style.transform = `rotateZ(${hh+(mm/12)}deg)`;




		mn.style.transform = `rotateZ(${mm}deg)`;




		sc.style.transform = `rotateZ(${ss}deg)`;
		})	





		let day = new Date();
		let hh = day.getHours() * 30;
		let mm = day.getMinutes() * deg;
		let ss = day.getSeconds() * deg;

		hr.style.transform = hr.style.transform = `rotateZ(${hh+(mm/12)}deg)`;


		mn.style.transform = `rotateZ(${mm}deg)`;


		sc.style.transform = `rotateZ(${ss}deg)`;

	</script>
</body>
</html>*
{
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body
{
	display: flex;
	justify-content: center;
	align-items: center;
	min-height: 100vh;
	background: #091921;
}

.clock 
{
	width: 350px;
	height: 350px;
	display: flex;
	justify-content: center;
	align-items: center;
	background: url(clock.png);
	border-radius: 50%;
	background-size: cover;
	border: 4px solid #091921;
	box-shadow: 0 -15px 15px rgba(255, 255, 255, 0.05),
					inset 0 -15px 15px rgba(255, 255, 255, 0.05),
					0 15px 15px rgba(0, 0, 0, 0.03),
					inset 0 15px 15px rgba(0, 0, 0, 0.03);
}

.clock:before
{
	content: '';
	position: absolute;
	width: 15px;
	height: 15px;	
	background: #fff;
	border-radius: 50%;
	z-index: 10000;	
}

.clock .hour,
.clock .min,
.clock .sec
{
	position: absolute;
}

.clock .hour, .hr
{
	width: 160px;
	height: 160px;
}


.clock .min, .mn
{
	width: 190px;
	height: 190px;
}

.clock .sec, .sc
{
	width: 230px;
	height: 230px;
}

.hr, .mn, .sc
{
	display: flex;
	justify-content: center;
	/*align-items: center;*/
	position: absolute;
	border-radius: 50%;	
}

.hr:before
{
	content: '';
	position: absolute;	
	width: 8px;
	height: 80px;
	background: #ff105e;
	z-index: 10;
	border-radius: 6px 6px 0 0; 
}



.mn:before
{
	content: '';
	position: absolute;	
	width: 4px;
	height: 90px;
	background: #fff;
	z-index: 11;
	border-radius: 6px 6px 0 0; 
}



.sc:before
{
	content: '';
	position: absolute;	
	width: 2px;
	height: 150px;
	background: #fff;
	z-index: 12;
	border-radius: 6px 6px 0 0; 
}
Source