Hilbert curves

In an attempt to further harass postscript printers, I hacked the postscript l-system which I wrote, err, a long time ago, so that instead of trees it draws hilbert curves. Then it occured to me to animate it, starting from a straight-ish line, and gradually folding it in, increasing the turn angle until it reaches 90 degrees. Kinda pretty. Makes me wonder how long the piece of string gets when it’s straightened out; might hack the postscript file to tell me that later.