rotwall

#! /bin/bash

# http://unix.stackexchange.com/questions/230238/starting-x-applications-from-the-terminal-and-the-warnings-that-follow
export NO_AT_BRIDGE=1

WALLPAPERS="/home/alex/Dropbox/backgrounds"
ALIST=( `ls -w1 $WALLPAPERS` )
RANGE=${#ALIST[@]}

let "number = $RANDOM"
let LASTNUM="`cat $WALLPAPERS/.last` + $number"
let "number = $LASTNUM % $RANGE"

echo $number > $WALLPAPERS/.last
nitrogen --set-scaled --save $WALLPAPERS/${ALIST[$number]}