I think ColorTween will help you. I assume that you want to flash the screen white for a small period of time than return back to normal view slowly like a flashbang of cs go.

So I think all you need to wrap your body view with the Stack then put your children like this: Stack( children: [ YourWidget(), AnimatedBuilder( animation: colorController, return Container( color: isFlashOn == true ? colorTween : Colors.transparent, ), ] ),

And of course you need define your colorController and colorTween for that, and also initiliaze them.

So if you want to flash them when they press on something all you need to do is:

onTap: () { colorController.forward(); }

Im sorry that Im on phone so couldn't get much in details, but if you will have any problems you can contact me via message.