<html>
<head>
<link href = "styling.css" rel = "stylesheet" type = "text/css"></link>
</head>
<body>
<svg class = "button" expanded = "true" height = "100px" width = "100px">
<circle cx = "50%" cy = "50%" r = "35%" stroke = "#000000" stroke-width = "10%" fill = "none"/>
<circle class = "innerCircle" cx = "50%" cy = "50%" r = "25%" fill = "#000000">
<animate attributeName="r" begin="0s" dur="1s" repeatCount="indefinite" from="5%" to="25%"/>
</circle>
</svg>
</body>
</html>