I was hoping somebody can help me write a raw HTML code for a page on my tumblr?

I have template for my "front page" however I have several pages that I would like to look different than my front page...I would like the posts filter to those that page to appear as a thumbnail...clicking that thumbnail will lead to the entire content of that post:

www.mywebsite.com ----> the link on my page-----> the filtered post from mywebsite.com (appearing as a photo thumbnail)

Any help would be appreciated and if you need any clarifications on something I said please ask!