Horizontal Arrows to Scroll to Next / Previous Articles

I'd like to add horizontal arrows that scroll as the user moves up and down a post, and the arrow on the right would go to the next article and the arrow on the left would go to the previous article (see this website for an example of the behavior I'm looking at for example: http://bits.blogs.nytimes.com/2015/02/04/verizon-wireless-joins-the-mobile-discount-parade/?module=BlogPost-Title&version=Blog%20Main&contentCollection=Mobile&action=Click&pgtype=Blogs&region=Body) ... How would I go about adding that functionality to my website, PantrySpa.com

Thanks for your help!