Been tinkering with the canvas tag in HTML5. I’ve tested these with Google Chrome.

http://www.roguelj.co.uk/sineart/a1.php
http://www.roguelj.co.uk/sineart/a2.php
http://www.roguelj.co.uk/sineart/a3.php
http://www.roguelj.co.uk/sineart/a4.php
http://www.roguelj.co.uk/sineart/a5.php

And the video that inspired these: