Transferring the design of an html page to my WordPress Blog.

So I wanna create my new blog. I have two html files with me. One has the homepage's design and the other has the post page's design. I want that exact design for my WordPress blog!

But how do I go about doing that? The only way I can think of is designing a new WordPress theme altogether! Is there any easy way? I've uploaded both the files on Google Drive. Unzip the folder!
https://drive.google.com/file/d/0By-e_j-W4HZ1NFhUMFBuUzhXME0/edit?usp=sharing