Hii friends,

I have completed hlml and css course. I want to make a funny pictures website where random pictures will show by clicking at a side button or just pressing keyboard left or right or just pressing refresh. Now I want to a new feature where user can comment and rate random funny pictures. Now I have realized that I cannot make my website with the help of html and css only. Can anyone suggest me what I do and what new language I learn to add my new feature to my website.