! twoblockershasslingrpentomino.cells ! Robert Wainwright, 1990 ! https://conwaylife.com/wiki/Two_blockers_hassling_R-pentomino ! https://conwaylife.com/patterns/twoblockershasslingrpentomino.cells ....OO...................O.... OOOO....OO..........OOO.OO..OO OOO.OO..OO..........OOOO....OO .....O..................OO.... .............................. .............................. .............................. .......OO............OO....... .......OO............OO....... .............................. ..................OOO......... .................O............ .................O..O......... ..................OO..........