The nph- portion of the filename
tells your server to not parse this file.
Therefore, it should, in theory, run slightly
faster as an animation script, since you are
interfacing directly with the client instead
of going through the server to the client.
That is the reason for the HTTP/1.0 200
OK line. This is a header response that
is normally sent by the server, but if the
server is not parsing your files, the script
will need to send this header line, as the
animation script does.