Discover the six best web design courses of 2024, tailored for beginners to pros, covering UX, HTML, CSS, and responsive design essentials.

Thimble, which is part of Mozilla's recently launched Webmaker project, is meant to help novice users write and edit basic HTML and CSS right in a web-based code editor.

CSS, or Cascading Style Sheets, defines the look and formatting of that HTML. Both are essential to coding your own website, and here's how to get acquainted with them.