Creating a simple theme

Now that we have reviewed the basics of how a theme is installed and configured, there is no better time than the present to create our own simple theme. We will begin by creating a theme named Twiggy that we will use to work with exploring how Twig and the theme system works in Drupal 8.

Step one - creating a new folder

Create a new folder under our themes folder called twiggy.

Step two - create an info file

Create a new file named twiggy.info.yml within our new theme folder, and add the following configuration information to the file:

name: Twiggy 
type: theme 
description: 'A simple theme' 
core: 8.x 
base theme: classy 
 
libraries: 
   - twiggy/global 
 
regions: 
  header: Header 
  primary_menu: 'Primary menu' 
  secondary_menu: 'Secondary menu' 
  breadcrumb: Breadcrumb 
  help: Help 
  highlighted: Highlighted 
  content: Content 
  sidebar_first: 'Left sidebar' 
  sidebar_second: 'Right sidebar' 
  footer: Footer 
  page_top: 'Page top' 
  page_bottom: 'Page...