java website help!

[Walalayo]

okay well i have this new job for a lady who just open up a shop and i am very new at making a website. i have only done one website and that was for my school but it only had simple java. For this website the client wants it to be like a castle where you go in and each room is a section of her store ( she is a retail store for like harry potter and things of that nature) i was thinking about having the doors open iand close but i dont see how i would even begin to do that.