This is my favored oh-my-zsh theme which forked by the official theme
robbyrussell and gnzh.
This theme uses many special unicode characters to be fancy, but it may cause some problems without well supported fonts. If you hope to find a theme more simple (such as using ascii-only prompt in a remote server), I recommend the ys.
I recommend to use antigen for installing this theme:
# $HOME/.zshrc
source /usr/local/share/antigen.zsh
antigen use oh-my-zsh
antigen theme xueruini/oh-my-zsh-seeker-theme seeker
antigen apply
It's easy to upgrade this theme with git:
cd $HOME/.oh-my-zsh/custom/themes/seeker
git pull --ff-only origin master
