private void button2_Click(object sender, EventArgs e)
        {
            //obj =  ds_list_find_value( frames, frame_num );
            //set_reg( obj, 1,1,198,198, block_black )

            block[, ,] tmp = myroom.getlist();
            int _x = 3;
            int _y = 1;
            int pos = 0;
            int[] pos_x = new int[100000];
            int[] pos_y = new int[100000];
            pos_x[0] = _x;
            pos_y[0] = _y;
            int[] find = new int[100000];
            Random r = new Random();
            List<int> rand = new List<int>();
            while (true)
            {
                int found = 0;
                if (_x > 3)
                    if (tmp[_x - 2, _y, 1].type != curblock.type)
                    {
                        find[found] = 0; found += 1;
                    }
                if (_x < worldWidth - 2)
                    if (tmp[_x + 2, _y, 1].type != curblock.type)
                    {
                        find[found] = 2; found += 1;
                    }
                if (_y > 1)
                    if (tmp[_x, _y - 2, 1].type != curblock.type)
                    {
                        find[found] = 1; found += 1;
                    }
                if (_y < worldHeight - 2)
                    if (tmp[_x, _y + 2, 1].type != curblock.type)
                    {
                        find[found] = 3; found += 1;
                    }

                rand.Clear();
                if (found == 0)
                {
                    pos -= 1;
                    _x = pos_x[pos];
                    _y = pos_y[pos];
                    //if pos > 4000 show_message( pos )
                    if (pos == 0) break;
                }
                else
                {
                    pos += 1;
                    for (int i = 0; i < found; i += 1)
                    {
                        rand.Add(find[i]);
                    }
                    //Listo.Listo.Shuffle<int>(rand);

                    rand[0] = rand[r.Next() % rand.Count];
                    switch (rand[0])
                    {
                        case 0:
                            myroom[_x - 1, _y, 1] = curblock;
                            myroom[_x - 1, _y, 1] = curblock;
                            myroom[_x - 2, _y, 1] = curblock;
                            tmp[_x - 1, _y, 1] = curblock;
                            tmp[_x - 1, _y, 1] = curblock;
                            tmp[_x - 2, _y, 1] = curblock;

                            _x -= 2;
                            pos_x[pos] = _x;
                            pos_y[pos] = _y;
                            break;
                        case 1:
                            myroom[_x, _y - 1, 1] = curblock;
                            myroom[_x, _y - 2, 1] = curblock;
                            tmp[_x, _y - 1, 1] = curblock;
                            tmp[_x, _y - 2, 1] = curblock;

                            _y -= 2;
                            pos_x[pos] = _x;
                            pos_y[pos] = _y;
                            break;
                        case 2:
                            myroom[_x + 1, _y, 1] = curblock;
                            myroom[_x + 2, _y, 1] = curblock;
                            tmp[_x + 1, _y, 1] = curblock;
                            tmp[_x + 2, _y, 1] = curblock;

                            _x += 2;
                            pos_x[pos] = _x;
                            pos_y[pos] = _y;
                            break;
                        case 3:
                            myroom[_x, _y + 1, 1] = curblock;
                            myroom[_x, _y + 2, 1] = curblock;
                            tmp[_x, _y + 1, 1] = curblock;
                            tmp[_x, _y + 2, 1] = curblock;
                            _y += 2;
                            pos_x[pos] = _x;
                            pos_y[pos] = _y;
                            break;
                    }
                }
            }

            myroom[1, 1, 1] = curblock;
            myroom[1, 2, 1] = curblock;
            myroom[2, 1, 1] = curblock;
            myroom[2, 2, 1] = curblock;
            myroom.flush();
        }