Need help with the roof

First time building a house without a tutorial. I'm confused on how the roof should look like.

https://preview.redd.it/3p95c3cafyog1.png?width=1920&format=png&auto=webp&s=c1ffc534b3b5f7e51631b36331a6c167e32f6942

https://preview.redd.it/ippzbozbfyog1.png?width=1920&format=png&auto=webp&s=0786c29936517b9b6b12a9fc660517698a8a450f