html draw rectangle with rounded corners
<!DOCTYPE html>
<html>
<head>
<style>
#svgelem {
position: relative;
left: 10%;
-webkit-transform: translateX(-20%);
-ms-transform: translateX(-20%);
transform: translateX(-20%);
}
</style>
<title>SVG</title>
</head>
<body>
<h2>HTML5 SVG Rectangle</h2>
<svg id="svgelem" width="300" height="200" xmlns="http://www.w3.org/2000/svg">
<rect x="50" y="20" rx="30" ry="30" width="150" height="150"
style="fill:blue;/">
</svg>
</body>
</html>