What would be the best way to display some sort of feedback when trigger is successful

I have triggers set on my magic mouse for copy and paste, two finger swipe up and two finger swipe down, respectively (probably seems silly but I like the setup).

Now and then I'll do copy something using this trigger and when I go to paste it pastes whatever was on the clipboard previously because I didn't realize my swipe up didn't register.

Any ideas on how to trigger some sort of feedback, like a quick screen flash or something so I can know it triggered successfully.

you can e.g. use the „show hud“ action