How can I make an image over an image in flutter?

I saw a lot posts about how to do a text into a picture, I tried it and the 2 pictures were like this:
images in flutter

but I want it like this:
how the images in flutter should look like

Can someone post an example?
Im too stupid for dart.

>Solution :

Use the Stack widget. It takes a list of widgets as children parameter, being the first one in the back of the stack and the last one in the front.
Set alignment parameter as Alignment.center to obtain the centered result you’re looking for.

Stack(
  alignment: Alignment.center,
  children: [
    Image(...), // Back image
    Image(...), // Front image
  ],
),