[Firewire]

pawn Код:

public OnPlayerDeath(playerid, killerid, reason)
{
    SetPlayerScore(killerid, GetPlayerScore(killerid) + 1);
    return true;
}

If you need help to understand what each part does, search on the SA:MP wiki, here is a link for you.
https://sampwiki.blast.hk/

EDIT: Congratulations on 1000 posts Cjgogo!