Calvin + NASA

#calvin
#
#set this for your self widthxheight  - no spaces
desksize="1680x1050"
# download image from apod site
wget -A.jpg -R.txt -r -l1 --no-parent -nH http://antwrp.gsfc.nasa.gov/apod/astropix.html
# move image from obscure folder to main folder, rename image
find ./apod -name "*.jpg" | while read line ; do
	mv "$line" "apod.jpg"
done
rm -r apod
	convert calvincanvas.png -background transparent -resize $desksize^ \
		-gravity center -extent $desksize^ calvincanvasRS.png
	convert apod.jpg -resize $desksize^ \
		-gravity center -extent $desksize^ apodRS.jpg
	convert apodRS.jpg calvincanvasRS.png -mosaic calvin.jpg
gconftool-2 --type string --set \/desktop/gnome/background/picture_filename "$PWD/calvin.jpg"