Operating System: Lubuntu 15.10
Graphics Adapter: Nvidia GeForce GTX 750
Driver:           Nvidia 352.63
Monitor 1:        HP LP2475w / connected via DVI-I-1 / 1920x1200
Monitor 2:        HP LP2475w / connected via DVI-D-0 / 1920x1200
XServer Screen:   3840x1200
PCManFM:          1.2.3

#!/bin/bash

WALLPAPER_DIR="$HOME/Pictures/Wallpapers"

# Function to format wallpaper names for display
format_name() {
    basename "$1" | sed -E 's/[0-9]+[kK]?[- ]?[0-9]*[a-z]*//g; s/-/ /g; s/\.(jpg|png|jpeg)$//I; s/\b([a-z])/\u\1/g; s/\s+/ /g; s/^\s+|\s+$//g'
}

# Get list of wallpapers and format them
mapfile -t wallpapers < <(find "$WALLPAPER_DIR" -type f \( -iname "*.jpg" -o -iname "*.png" -o -iname "*.jpeg" \))
formatted_names=()

for wp in "${wallpapers[@]}"; do
    formatted_names+=("$(format_name "$wp")")
done

# Store current wallpaper
current_wallpaper=$(grep 'feh --bg-scale' ~/.fehbg | cut -d "'" -f2)

# Let rofi show and capture the selection live
selection=$(printf "%s\n" "${formatted_names[@]}" | rofi -dmenu -i -p "Select Wallpaper" -format "s" -monitor-changes | while read -r selected_name; do
    for wp in "${wallpapers[@]}"; do
        if [ "$(format_name "$wp")" == "$selected_name" ]; then
            # Change wallpaper temporarily as user browses
            feh --bg-scale "$wp"
            break
        fi
    done
done)

# Revert to previous wallpaper if no final selection
if [ -z "$selection" ]; then
    [ -n "$current_wallpaper" ] && feh --bg-scale "$current_wallpaper"
fi

feh --bg-fill ~/wallpapers/squid-girl.png

0.016666667
    /home/redacted/Pictures/W6cMZ6wfCjk/frames/001.png
  
  
    0.016666667
    /home/redacted/Pictures/W6cMZ6wfCjk/frames/002.png

Redacted Wallpaper
   /home/redacted/Pictures/W6cMZ6wfCjk/live-wallpaper.xml
   zoom

[Unit]
Description=Timer for background change

[Timer]
OnUnitActiveSec=10sec
OnActiveSec=5sec
OnBootSec=1sec
Persistent=true

[Install]
WantedBy=timers.target

[Unit]
Description=Change background image periodically

[Service]
Type=oneshot
Environment=DISPLAY=:0
ExecStart=/home/emobe/scripts/changebg.sh

#!/bin/bash
feh --no-fehbg --bg-scale --randomize /home/emobe/Pictures/wallpapers/*

● bgchange.timer - Timer for background change
     Loaded: loaded (/etc/systemd/system/bgchange.timer; enabled; preset: disabled)
     Active: active (waiting) since Fri 2023-01-06 09:33:44 GMT; 4h 12min ago
      Until: Fri 2023-01-06 09:33:44 GMT; 4h 12min ago
    Trigger: Fri 2023-01-06 13:46:24 GMT; 4s left
   Triggers: ● bgchange.service

Fri 2023-01-06 17:39:24 GMT 3h 52min left Thu 2023-01-05 23:57:47 GMT 13h ago            updatedb.timer                   updatedb.service
Sat 2023-01-07 00:00:00 GMT 10h left      Fri 2023-01-06 00:00:01 GMT 13h ago            logrotate.timer                  logrotate.service
Sat 2023-01-07 00:00:00 GMT 10h left      Fri 2023-01-06 00:00:01 GMT 13h ago            shadow.timer                     shadow.service
Sat 2023-01-07 09:48:44 GMT 20h left      Fri 2023-01-06 09:48:44 GMT 3h 58min ago       systemd-tmpfiles-clean.timer     systemd-tmpfiles-clean.service
Sat 2023-01-07 09:54:52 GMT 20h left      Fri 2023-01-06 00:34:15 GMT 13h ago            man-db.timer                     man-db.service
Sat 2023-01-07 15:00:00 GMT 1 day 1h left Tue 2022-12-06 22:57:11 GMT 1 month 0 days ago pamac-cleancache.timer           pamac-cleancache.service
Thu 2023-01-12 08:45:44 GMT 5 days left   Thu 2023-01-05 23:57:47 GMT 13h ago            pamac-mirrorlist.timer           pamac-mirrorlist.service
Thu 2023-01-12 20:26:18 GMT 6 days left   Fri 2023-01-06 00:25:48 GMT 13h ago            archlinux-keyring-wkd-sync.timer archlinux-keyring-wkd-sync.service
-                           -             Fri 2023-01-06 13:46:53 GMT 74ms ago           bgchange.timer                   bgchange.service