#!/bin/ksh

chmod +w *
chmod +r *
chgrp botany *

for file in  asp*.jpg
do
    output=`echo $file | sed -e 's/.jpg/.gifs/'`
    if [[ ! -a $output ]] then
        echo "doing $file, outputting to $output"
        djpeg -P  $file |
        pnmscale -xysize 120 120 |
        ppmquant 256 |
        ppmtogif > $output
    fi
done