Changing Bootstrap Styles in SASS

1. Create two folders css and scss
2. Download source bootstrap
3. Create a file in scss like custom_bootstrap.scsss
   1. in the file in order to import original bootstrap.scss type @import "../bootstrap/scss/bootstrap"
4. Create a file in scss like custom.scsss
   1. in the file write any scss code to overwrite default one. like body{background:purple;}
5. Create a file in scss like main.scsss This will merge original and our custom together
   1. in the file import custom_bootstrap.scss type @import "custom_bootstrap"
   2. in the file import custom.scss type @import "custom"

and by using Sass Compiler - Koala, compile main.scss to app.css in css folder