[miokie]

At The top of your script:

pawn Код:

new Kills[MAX_PLAYERS];

OnGameModeInit:

pawn Код:

SetTimer("CheckKills",100,1);

Anywhere:

pawn Код:

public CheckKills(playerid)
{
  if(Kills[playerid] == 5)
  {
    Kills[playerid] = 0;
        for(new i = 0; i <= MAX_PLAYERS; i++)
    {
        SetPlayerMarkerForPlayer(playerid,i,0xFF0000FF);//This sets all other player markers FOR THAT PLAYER to red. Not sure how to jsut show them.
    }
  }
}

OnPlayerDeath

pawn Код:

Kills[killerid] += 1;

(Untested, But looks like it should work.)