Random wallpaper every half an hour

rollpaper.sh

#!/bin/sh

export DISPLAY=${DISPLAY:-:0}

while true
do
	feh --bg-scale --randomize ~/Images/Wallpapers
	sleep 1800
done

xinitrc.example.sh

# 1. Spawn rollpaper in background
# 2. Run favorite window manager

$HOME/bin/rollpaper.sh &
i3