Navigation for Tumblr theme

***PLEASE read the full project description BEFORE placing a bid, DO NOT post a ridiculous bid amount, and DO NOT send me a generic message filled with unrelated work or else you will be ignored.*** I am currently developing a full screen Tumblr theme for re-sale, but I require some assistance to create the navigational elements of it. To better understand what I am about to explain, please view the theme as it stands currently at http://alyxtakla1.tumblr.com. The password is 'freelancer'. Essentially I would like my theme to have a similar function to the following demo, with up and down arrows to vertically navigate/scroll between each post: [login to view URL] Along with your bid please outline how you intend to implement this feature in to my Tumblr theme, or feel free to offer your own alternative ideas. Thanks.