How to play .gif for some seconds?

Stack([Image.asset("assets/Icon/Checkbox.png",    color: uncheckedColor,    height: 22,    width: 22,    ),Image.asset("assets/Icon/fullyComplete1.gif",    color: uncheckedColor,    scale: 2.5,    opacity: const AlwaysStoppedAnimation<double>(1.0),    height: 22,    width: 22,    gaplessPlayback: true,  )])

I want play GIF file for 1 or 2 seconds then I have to show png file.

How can I achieve it?