{
  "version": "0.1",
  "nodes": {
    "1": {"id": 1, "name": "base_cube", "op": {"type": "Cube", "size": {"x": 80, "y": 80, "z": 10}}},
    "2": {"id": 2, "name": "base", "op": {"type": "Translate", "child": 1, "offset": {"x": -40, "y": -40, "z": 0}}},
    "3": {"id": 3, "name": "mid_cube", "op": {"type": "Cube", "size": {"x": 60, "y": 60, "z": 10}}},
    "4": {"id": 4, "name": "mid", "op": {"type": "Translate", "child": 3, "offset": {"x": -30, "y": -30, "z": 10}}},
    "5": {"id": 5, "name": "top_cube", "op": {"type": "Cube", "size": {"x": 40, "y": 40, "z": 10}}},
    "6": {"id": 6, "name": "top", "op": {"type": "Translate", "child": 5, "offset": {"x": -20, "y": -20, "z": 20}}},
    "7": {"id": 7, "name": "base_mid", "op": {"type": "Union", "left": 2, "right": 4}},
    "8": {"id": 8, "name": "pyramid", "op": {"type": "Union", "left": 7, "right": 6}},
    "10": {"id": 10, "name": "hole_cyl", "op": {"type": "Cylinder", "radius": 3, "height": 10, "segments": 32}},
    "11": {"id": 11, "name": "hole1", "op": {"type": "Translate", "child": 10, "offset": {"x": 30, "y": 30, "z": 0}}},
    "12": {"id": 12, "name": "hole2", "op": {"type": "Translate", "child": 10, "offset": {"x": -30, "y": 30, "z": 0}}},
    "13": {"id": 13, "name": "hole3", "op": {"type": "Translate", "child": 10, "offset": {"x": -30, "y": -30, "z": 0}}},
    "14": {"id": 14, "name": "hole4", "op": {"type": "Translate", "child": 10, "offset": {"x": 30, "y": -30, "z": 0}}},
    "15": {"id": 15, "name": "h12", "op": {"type": "Union", "left": 11, "right": 12}},
    "16": {"id": 16, "name": "h34", "op": {"type": "Union", "left": 13, "right": 14}},
    "17": {"id": 17, "name": "all_holes", "op": {"type": "Union", "left": 15, "right": 16}},
    "18": {"id": 18, "name": "result", "op": {"type": "Difference", "left": 8, "right": 17}}
  },
  "materials": {},
  "part_materials": {},
  "roots": [{"root": 18, "material": "default"}]
}