<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js">
</script>
<style>
.clocks {
height: 500px;
margin: 25px auto;
position: relative;
width: 500px;
}
</style>
<div class="clocks">
<canvas id="canvas" width="500" height="500"></canvas>
</div>
<script>
var canvas, ctx;
var clockRadius = 250;
var clockImage;
function clear() {
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
}
function drawScene() {
clear();
var date = new Date();
var hours = date.getHours();
var minutes = date.getMinutes();
var seconds = date.getSeconds();
hours = hours > 12 ? hours - 12 : hours;
var hour = hours + minutes / 60;
var minute = minutes + seconds / 60;
ctx.save();
ctx.drawImage(clockImage, 0, 0, 500, 500);
ctx.translate(canvas.width / 2, canvas.height / 2);
ctx.beginPath();
ctx.font = '36px Arial';
ctx.fillStyle = '#000';
ctx.textAlign = 'center';
ctx.textBaseline = 'middle';
for (var n = 1; n <= 12; n++) {
var theta = (n - 3) * (Math.PI * 2) / 12;
var x = clockRadius * 0.7 * Math.cos(theta);
var y = clockRadius * 0.7 * Math.sin(theta);
ctx.fillText(n, x, y);
}
ctx.save();
var theta = (hour - 3) * 2 * Math.PI / 12;
ctx.rotate(theta);
ctx.beginPath();
ctx.moveTo(-15, -5);
ctx.lineTo(-15, 5);
ctx.lineTo(clockRadius * 0.5, 1);
ctx.lineTo(clockRadius * 0.5, -1);
ctx.fill();
ctx.restore();
ctx.save();
var theta = (minute - 15) * 2 * Math.PI / 60;
ctx.rotate(theta);
ctx.beginPath();
ctx.moveTo(-15, -4);
ctx.lineTo(-15, 4);
ctx.lineTo(clockRadius * 0.8, 1);
ctx.lineTo(clockRadius * 0.8, -1);
ctx.fill();
ctx.restore();
ctx.save();
var theta = (seconds - 15) * 2 * Math.PI / 60;
ctx.rotate(theta);
ctx.beginPath();
ctx.moveTo(-15, -3);
ctx.lineTo(-15, 3);
ctx.lineTo(clockRadius * 0.9, 1);
ctx.lineTo(clockRadius * 0.9, -1);
ctx.fillStyle = '#0f0';
ctx.fill();
ctx.restore();
ctx.restore();
}
$(function(){
canvas = document.getElementById('canvas');
ctx = canvas.getContext('2d');
clockImage = new Image();
clockImage.src = 'https://static.runoob.com/images/mix/125855_nnla_89964.png';
setInterval(drawScene, 1000);
});
</script>