<!DOCTYPE html>
<html lang="en">
<head>
<title>HTML5 SVG Tag</title>
</head>
<body>
<svg id="svgelem" height="150" xmlns="http://www.w3.org/2000/svg">
<circle id="bluecircle" cx="40" cy="40" r="40" fill="blue" />
</svg><br>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="190">
<polygon points="100,10 40,180 190,60 10,60 160,180"/>
</svg><br>
<svg id="svgelem" height="200" xmlns="http://www.w3.org/2000/svg">
<line x1="0" y1="0" x2="200" y2="100" style="stroke:blue;stroke-width:5"/>
</svg><br>
<svg id="svgelem" height="200" xmlns="http://www.w3.org/2000/svg">
<defs>
<radialGradient id="gradient" cx="50%" cy="50%" r="50%" fx="50%" fy="50%">
<stop offset="0%" style="stop-color:rgb(200,200,200); stop-opacity:0"/>
<stop offset="110%" style="stop-color:rgb(0,0,255); stop-opacity:1"/>
</radialGradient>
</defs>
<ellipse cx="100" cy="50" rx="100" ry="50" style="fill:url(#gradient)" />
</svg>
</body>
</html>