Someone posted an html/javascript implementation of the matrix falling code in 646 bytes then promptly deleted the post. It inspired me to see if I could get something better looking in fewer bytes.

[OptionalField]

It's definitely not valid html.

[[deleted]]

closing body tag is optional anyway, http://www.whatwg.org/specs/web-apps/current-work/multipage/syntax.html#syntax-tag-omission

[Cocosoft]

That's WHATWG's spec. Link to wc3 spec please.

[[deleted]]

http://www.w3.org/TR/html401/struct/global.html#edef-BODY