[The_Moddler]

pawn Код:

new pKill[MAX_PLAYERS];
new pCount[MAX_PLAYERS];

if(IsPlayerInArea(playerid, x_MAX, x_MIN, y_MAX, y_MIN))
{
    if(!IsPlayerAdmin(playerid))
    {
        pKill[playerid] = SetTimerEx("KillTime", 15000, false, "i", playerid);
    }
    return 1;
}
else if(!IsPlayerInArea(playerid, x_MAX, x_MIN, y_MAX, y_MIN))
{
    KillTimer(pKill(playerid));
    pCount[playerid] = 15;
    return 1;
}

forward KillTime(playerid);
public KillTime(playerid)
{
    pCount[playerid]--;
    if(pCount > 15)
    {
        SetPlayerHealth(playerid, 0.0);
        pCount[playerid] = 15;
    }
}

You obviusly will have to create your textdraw and add the coordinates.