SASS - Koala

In the post, I would let you know how to use SASS by using an application called Koala.

First of all, Koala is open source so feel free to download from given link below!
http://koala-app.com/

Following the step by step now,

1) Create two folders named css and scss having style.css and style.scss at each as an example.
    ( ** two folders belong to public folder)

2) By using Koala application, upload the public folder.

3) After clicking the "scss/style.scss", click the right button of the mouse and following that, click the "Set Output Path" and it would be appointed to css file which is stored in the css folder.

4) Checked whether option "Auto Compile" is checked or not, Output Style will be "compact" then, click the compile.

5) Now, you can see whenever you write down something on scss file, it would be shown that the code is automatically changed into css file.