public void CheckRows()
	{
		for( int n= ROWS - STAGING_ROWS; n>=0; n-- ) {
			boolean rowFull = true;
			for (int c=0; c < COLS; c++)
				if (!colorGrid[n][c].isSet)
					rowFull = false; //if we find a column not set
									//then the row is not full

			//if the row was full and it isn't already in
			//rowsToClear then add it and increment numRowsToClear
			if( rowFull && !fullRow( n ))
			{
				RowsClearing = true;
				rowsToClear[numRowsToClear] = n;
				numRowsToClear++;
			}
		}
	}