init | start | infinite | stop
<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<head>
  <link rel="stylesheet" type="text/css" href="nattoh.css" />
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>

</body>
</html>
max width: px/box.
max width: px/window.
t g    ^ ^ ^ ^    +    -
- +