ref: f1b5bedb72022c5e0ca8b9808bad89c0865e5be1
dir: /examples/pendulum.orca/
......................................... .#.PENDULUM.#............................ ......................................... ......................................... ......................................... ............U........W.....U............. ....................J.................... ...................B.H................... ....................xS................... ......................................... ......................................... ......................................... ......................................... ......................................... ......................................... ......................................... .........................................