Hello everyone! I see very many website user roller on the menu top, a effects very beautyful. Like website http://www.thietkeweb.com/ . I don’t know use function to create like that. I hope get help to everyone. Thanks so much!
Hi lostloved. Welcome to the forums. 
That’s called a “lavalamp” effect, I believe.
See if these help:
Thanks MR.ralph.m so much, i’m in Vietnamese so I speak english not good :). thanks U again. Good luck for U.