<html>
<canvas id=c width=200 height=200></canvas>
<script>
c = document.getElementById('c');
x = c.getContext('2d');
x.strokeStyle = 'black';
for (i = 0; i < 8; ++i) {
x.strokeRect(50, 50, 50, 50);
x.rotate(0.05);
}
</script>
</html>