Human: How to build a website using HTML and CSS? Assistant: 
To build a website using HTML and CSS, you will need to learn the basics of both. Firstly, for HTML, you should be familiar with HTML structures, elements and attributes, as well as how to create a basic web page. Secondly, for CSS, you should learn the fundamentals of Cascading Style Sheets, including how to select elements, create classes and design basic layouts. Once you have mastered both HTML and CSS, you can create a web page by using HTML to define the structure and content of the page, and CSS to define the style and layout of the page.