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On the surface, scroll clock looks like a simple visual trick: Look, it’s a clock made out of moving scroll bars! This is a marginally clever animation! Then you realise that every one of them actually works.

It’s been a looooong time since I’ve done anything resembling serous web design, so my initial reaction was an iframe-induced panic — what black magic is this, etc — but a quick View Source painted a neat, tidy picture of CSS and Javascript, working together to shatter our basic intuitions about How Things Move on the internet.

And while it may be a decade late, this is the first truly compelling use for Windows’ old Active Desktop feature I’ve ever seen. This one’s for you, inexplicably extant Windows ME users. [Scroll Clock — Thanks, Marco!]