case (byte) Command.LOOP_BEG:
                        if(Cell.Value == 0)
                        {
                            int depth = 0;
                            while(true)
                            {
                                begin:
                                switch (ByteCode[IP])
                                {
                                    case (byte) Command.LOOP_BEG:
                                        depth++;
                                        break;
                                    case (byte) Command.LOOP_END:
                                        depth--;
                                        if(depth == 0) goto end;
                                        break;

                                }
                                IP++;
                                goto begin;

                                end:
                                break;
                            }
                        }
                        else
                        {
                            Stack.Push(IP);
                        }
                        break;