#!/usr/bin/env bash
# shiftwallpaper.sh
# A very simple bash script to shift wallpaper every n seconds.
# Turns your desktop in a kind of digital frame :-)
# Tested in and for Fluxbox [TM].
# Public Domain Code. No Warranty at all.
# ksaver, July 2011.

# Modify this line to you own wallpapers directory.
WALLPAPER_DIR="$HOME/MyPictures/Wallpaper"

# Set interval in seconds to shift wallpaper.
WAIT=120

function load_wallpapers()
{
# Load the wallpaper list into an array
# loads new wallpapers added to directory in runtime.
n=0
for wallpaper in "$1/*"; do
wallpaper_list[n]=$wallpaper
let n=$n+1
done
}

function rotate_wallpapers()
{
# Rotate wallpaper every n seconds.
for wallpaper in ${wallpaper_list[@]}; do
/usr/bin/env fbsetbg -F $wallpaper
sleep $1
done
}

## main()
while [ True ]; do
load_wallpapers $WALLPAPER_DIR
rotate_wallpapers $WAIT
done