The theme I’m using for this site is really nice, but I didn’t create it. here’s how you can install it too. :)
# please make sure you have already installed git tools and ruby tools(gem)
$ gem install sass
$ gem install jekyll
$ git clone https://github.com/yulijia/freshman21.git
Then, change the folder name to you own github page name, forexample
$ mv freshman thisisyouname.github.io