<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Dva Demo</title>
<link rel="stylesheet" href="index.css" />
</head>
<body>
<div id="root">
<canvas width="800" height="800" id="canvas"></canvas>
</div>
<script src="index.js"></script>
<script>
let canvas=document.getElementById('canvas');
let context=canvas.getContext('2d');
context.beginPath();
for(let i=0;i<5;i++) {
context.lineTo(Math.cos((18+72*i)/180*Math.PI)*300+400,-Math.sin((54+72*i)/180*Math.PI)*300+400);
context.lineTo(Math.cos((18+72*i)/180*Math.PI)*150+400,-Math.sin((54+72*i)/180*Math.PI)*150+400);
}
context.closePath();
context.lineWidth=10;
context.stroke();
</script>
</body>
</html>
