osx webcam 2 bg

backgroundz.scpt

on run argv
  tell application "System Events"
      set desktopCount to count of desktops
      repeat with desktopNumber from 1 to desktopCount
          tell desktop desktopNumber
              set picture to item 1 of argv
          end tell
      end repeat
  end tell
  --beep
end run

backgroundz.sh

#!/bin/bash
#
#   run on cron every min
#
CAMURL="$1"
CAMNAME="$2"
KEEP=10                                  #  keep this many webcam images
OLD=(`ls -t ~/BGs/${CAMNAME}-*`)         #  store old filenames in array
NAME="~/BGs/${CAMNAME}-$(date +%s).jpg"  #  create new filename

#  download current webcam image
/usr/local/bin/wget -O "$NAME" $CAMURL

#  if successful continue
if [ $? -ne 0 ]
  then
    #  update current background
    osascript ~/scripts/backgroundz.scpt $NAME
    #  cleanup - remove files that are older than tenth
    NUMBG="${#OLD[@]}"
    if [ $NUMBG > $KEEP ]
      then
        i=$KEEP
        while (( $i < $NUMBG ))
          do
            rm ${OLD[$i]}
            i=$(($i+1))
          done
    fi
fi

crontab

*/3 * * * *     /bin/bash ~/scripts/backgroundz.sh http://qt.exploratorium.edu/roofcam/Observatory/image.jpg           observatory  > /dev/null 2>&1
2-59/15 * * * * /bin/bash ~/scripts/backgroundz.sh http://warschauerstr-berlin.contempo-webcam.de/webcam.jpg           berlin       > /dev/null 2>&1
1-59/3 * * * *  /bin/bash ~/scripts/backgroundz.sh http://210.157.212.207/SnapshotJPEG?Quality=Clarity&dummy=image.jpg japan        > /dev/null 2>&1