Decay Ported for dunst!
Just execute the next commands
git clone --depth=1 https://github.com/decaycs/dunst decay-dunst
cd decay-dunst
Then move the files into your dunst's configuration folder.
# remember to change <theme> to one of: decayce, dark-decay, decay or light-decay
cp -r ./src/<theme>-dunstrc ~/.config/dunst/dunstrc
That was all! Enjoy