How to place images on top of another?

Question

Web development

Hello
I have one idea, I don't know how to implement it.
The idea is this.
I have a site. The site has user avatars.
I want something on top of the avatar, another image is displayed, but already animated.
I mean, there is an avatar, and on top of it, an animated frame)
I hope you understand what I want)

Answer 1

z-index in the block where the layer with the avatar is displayed and in the same block the layer with the GIF

Answer 2

well, it’s more like working with styles, if I understood everything correctly for the avatar image in the css
file
z-index: 1
z-index: 10