randomly pick 2 images, combine them, and set it as desktop

wallpaper.sh

#!/bin/sh

d="$HOME/wallpaper"
o=`mktemp`
c=`ls $d | grep -iE "(.jpg|.gif|.png)" | sort -R | head -2`

if [ $# -gt 0 ] ; then 
	a=$1
else
	a=`echo $c | cut -d " " -f 1`
fi
if [ $# -gt 1 ] ; then 
	b=$2
else
	b=`echo $c | cut -d " " -f 2`
fi

montage $d/$a $d/$b -tile 2x1 -geometry 1920x1080 $o
feh --bg-tile $o
rm $o