1. Edit pacman source file
sudo vim /etc/pacman.conf
2. Add the following code to the file
[xenlism-arch]
SigLevel = Never
Server = http://downloads.sourceforge.net/project/xenlism-wildfire/repo/arch
3. Update system source datebase
sudo pacman -Syyu
4. Install gnome-tweak-tool
pacman -S gnome-tweak-tool
5. Install icon && theme
yaourt -S moka-icon-theme-git numix-circle-icon-theme-git
yaourt -S sky-gtk-theme
yaourt -S moka-icon-theme-git
pacman -S gtk-theme-arc
pacman -S numix-icon-theme-git
pacman -S xenlism-minimalism-theme xenlism-wildfire
6. Install gnome shell extension