Random ordering of posts on a tumblr site

I'm trying to add to my Tumblr site an additional page that displays all my posts in a random order. Effectively each time this page is loaded or refreshed the posts would be re-ordered randomly. I really want this functionality for my online art and words project as I want people to be able to discover earlier posts in an easy and fun way. I know tumblr already has an inbuilt "/random" feature but this only displays a single post, rather thank randomly ordering all posts. For reference my site is here.

I struggled with some other answers I found on this site as I'm less confident with how exactly to edit and implement changes to my specific themes javascript as opposed to just simply changing the appearance using html and css.

Any help or tips would be much appreciated,

Thanks

Kyle