Laravel mix multiple file

I want to keep the app.scss to keep pointing to the app.css my problem is how do i add another path. Example I created a blog.scss file and i want it to point to blog.css . A simple sample will make sense to me thanks... If i didn't put my question right you can aid me rephrase it..

``const mix = require('laravel-mix');

mix.sass('resources/sass/app.scss', 'public/css');``