<!DOCTYPE html>
<html lang="en-US">
<head>
<title>test of svg-as-border-image</title>
<style>
div.border {
  width: 10px;
  height: 10px;
  background-color: blue;
  border: 15px solid;
  border-image: 25% url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"><rect x="0" y="0" width="25%" height="25%" fill="pink"/><rect x="75%" y="75%" width="25%" height="25%" fill="green"/></svg>');
}
</style>
</head>
<body>
<div class="border"></div>
</body>
</html>