Player get KOs if npcs are killed

I been trying to make it were if a player KOs an npc it would give the player 1+ KO I tried to make a script but it did not work so I looked at toolbox for stuff and found 1 thing but dose not work.
Any feedback will help!

People can’t really help you if you don’t send images/videos

RobloxScreenShot20210718_224320815 (2)
KO as in knockout
Screenshot (28)
and the zomibe is a npc there other npcs to
dose that help?