How to create the website to fit with every screen?

Answer 1

try out the framework bootstrap, it's quite complicated but your website will look awesome on every device

Answer 2

"Responsive design" and "media queries" are the key words to do it yourself, or at least for better understanding what you handle more easily with frameworks as bootstrap ( don't means easy, means less difficult/complex :P ), which are able to produce real responsive pages if correctly used ^^

Answer 3

Also you could use media queries on css

Answer 4

search responsive design on YouTube