If I want to make really good websites, what must I learn?

Question

html, css, javascript. Is there anything else?

Answer 1

Well, you should also learn something about UI design principles.
Also you need some server side scripting language (if you will plan to do more than small sites - or you will not use NodeJS as a server), some databases, and something about commonly used development tools - from linters to SASS (or LESS), Bower and so on.

Answer 2

thank you :)