How do I make a first person pov blink effect in UE5?

So I’m kind of new to Unreal Engine and so I’m not sure exactly how to go about doing this but I wanted to create a first-person view from a cinecamera and have a blink effect (only a couple) and then it would go to regular gameplay and stuff but how would I go about making a blink effect? I have seen some people say using a post-process and others have said widgets are the way to go. I also seen some say to use 2 cubes-- one below and one above-- and smoothly transition them down to create a blink effect. Which way do you guys think is the best and could anyone help with the steps to create that? Any help would be appreciated!