see

#!/bin/bash
# see name_of_file.png
# watch the screen using a browser
# run under apache root
# provide file name
# load that address in browser
# refresh page

screencapture="/usr/sbin/screencapture"
sleep="/bin/sleep"

if [ -s "$1" ]
        then
                while screencapture -x "$1"; do sleep 0.98; done
fi
exit