new bool: nacallback[MAX_PLAYERS];

public OnPlayerRequestClass(playerid, classid)
{
    nacallback[playerid] = true;
    return true;
}

public OnPlayerSpawn(playerid)
{
    nacallback[playerid] = false;
    return true;
}

public OnPlayerText(playerid, text[])
{
    if(nacallback[playerid] == true) return 0;
    for(new progressao, PP = GetMaxPlayers(); progressao < PP; progressao++)
    {
        if(nacallback[progressao] == true)
        {
            new linhas = 0;
            while(linhas < 100)
            {
                SendClientMessage(playerid, 0x1E90FF99, " ");
                ++linhas;
                if(linhas == 100)
                {
                    linhas = 0;
                    break;
                }
            }
         }
     }
    return true;
}

new bool: carol[MAX_PLAYERS];

public OnPlayerRequestClass(plauerid, classid)
{
    carol[playerid] = true;
    return 1;
}

public OnPlayerSpawn(playerid)
{
    carol[playerid] = false;
    return
}

public OnPlayerText(playerid, text[])
{
    if(carol[playerid])
    {
        SendClientMessage(playerid, -1, text);
        return 0;
    }
    return 1;
}