wp-content/themes directory in your Development site’s file structure.
Create a new directory named
first-block-theme directory in your IDE
create a new file named style.css
Add the following code to the file
Code language: JSON / JSON with Comments (json)
/* Theme Name: My First Block Theme */
The header section of style.css will typically contain more information than this but the Theme Name is required in order for WordPress to identify the files in your theme directory as a theme that can be activated.