if [ ! -d "$HOME/Pictures/Wall" ]; then
exit 1
fi
while IFS= read -r file; do
# Add space between filenames if string is not empty
if [ -n "$files_string" ]; then
files_string+=" "
fi
files_string+="$file"
done < <(find "$HOME/Pictures/Wall" -type f)
echo $files_string
feh --bg-fill $files_string
compton &