new CountTimer[MAX_PLAYERS];
new Count[MAX_PLAYERS];

public OnPlayerDeath(playerid, killerid, reason)
{
    if(killerid != INVALID_PLAYER_ID)
    {
        Count[playerid] = 0;
        CountTimer[playerid] = SetTimerEx("Countdown", 1000, true, "d", playerid);
    }
    return 1;
}

forward Countdown(playerid);
public Countdown(playerid)
{
    if(Count[playerid] < 5)
    {
        new str[1];
        Count[playerid] += 1; 
        format(str, sizeof(str), "%d", Count[playerid]);
        GameTextForPlayer(playerid, str, 1000, 3);
    }
    else KillTimer(CountTimer[playerid]);
    return 1;
}