private void shiftRowsDown(int start) {
			for (int rowNum = start; rowNum < maxHeight - 1; rowNum++) {
				if (start == height - 1) {
					widths[start] = 0;
				}else {
					copyRow(rowNum, rowNum + 1);
				}
			}
			falsifyRow(maxHeight - 1);
			widths[maxHeight - 1] = 0;
		}