css/css-paint-api/geometry-border-image-005-ref.html

<!DOCTYPE html>
<html>
<style>
html, body { margin: 0; padding: 0; }
</style>
<body>
<canvas id ="canvas" width="308" height="308"></canvas>
<script>
var canvas = document.getElementById('canvas');
var context = canvas.getContext("2d");
context.fillStyle = "green";
context.fillRect(0, 0, 290, 18);
context.fillRect(0, 0, 18, 290);
context.fillRect(0, 254, 290, 36);
context.fillRect(254, 0, 36, 290);
</script>
</body>
</html>