FCNPC_SetUpdateRate(100); // Muda a taxa de atualização da callback FCNPC_OnUpdate, recomendado 100ms

public FCNPC_OnUpdate(npcid)
{
    foreach(new i : Player)
    {
        if(!IsPlayerNPC(i) && IsPlayerConnected(i))
        {
            static Float:zP[3], Float:pP[3];
            GetPlayerPos(npcid, zP[0], zP[1], zP[2]);
            GetPlayerPos(i, pP[0], pP[1], pP[2]);
            if(IsPlayerInRangeOfPoint(i, 20.0, zP[0], zP[1], zP[2]))
            {
                if(GetPlayerState(i) == PLAYER_STATE_ONFOOT)
                {
                    FCNPC_GoToFixZ(npcid, pP[0], pP[1], pP[2], MOVE_TYPE_RUN, 0.5, true, 0.0, true, 0.1);
                    if(GetDistanceBetweenPlayers(npcid, i) < 1.2)
                    {
                        FCNPC_Stop(npcid);
                        FCNPC_MeleeAttack(npcid, -1, true);
                        return 1;
                    }
                    else FCNPC_StopAttack(npcid);
                }
            }
        }
    }
    return 1;
}