Animated images as multipart PNGs

Server-Push is a neat way to generate animated images. You start with

HTTP/1.0 200 OK
Server: Apache/1.2b6
MIME-Version: 1.0
Content-Type: multipart/x-mixed-replace;boundary=EOM

--EOM
Content-Type: image/png

and then send the first PNG-image. At the end you ship

--EOM

Whenever you want to update the image you send again

Content-Type: image/png

then the image and then the boundary

--EOM