Custom

use_xft yes
xftfont Ubuntu:size=36
xftalpha 0.1
update_interval 1

own_window yes
own_window_type desktop
own_window_transparent yes
own_window_hints undecorated,below,sticky,skip_taskbar,skip_pagers
own_window_argb_visual yes
own_window_argb_value 200

double_buffer yes
draw_shades no
draw_borders no
draw_graph_borders no
default_color white
default_shade_color white
default_outline_color white
alignment bl
gap_x 40
gap_y 40

TEXT
${color AAAAAA}${font Ubuntu:size=34}ubuntu 16.04 LTS
${color 555555}${font Ubuntu:size=16}Current wallpaper filename: ${exec basename `gsettings get org.gnome.desktop.background picture-uri` | sed s/.$//}