{"description": "One sketch of four squares drawn edge to edge, three extruded up and three down from it and joined: every side wall spans both extrudes or runs along two coincident sketch lines.",
 "commands": [
  {"command": "sketch.create", "params": {"plane": "XY", "name": "Squares"}},
  {"command": "sketch.rectangle.two_point", "params": {"p0": [0, 0], "p1": [10, 10]}},
  {"command": "sketch.rectangle.two_point", "params": {"p0": [-10, 0], "p1": [0, 10]}},
  {"command": "sketch.rectangle.two_point", "params": {"p0": [0, -10], "p1": [10, 0]}},
  {"command": "sketch.rectangle.two_point", "params": {"p0": [-10, -10], "p1": [0, 0]}},
  {"command": "sketch.finish", "params": {}},
  {"command": "solid.extrude", "params": {"sketch": "Squares", "profiles": [{"point": [-5, 5]}, {"point": [-5, -5]}, {"point": [5, -5]}], "distance": 10}},
  {"command": "solid.extrude", "params": {"sketch": "Squares", "profiles": [{"point": [5, 5]}, {"point": [5, -5]}, {"point": [-5, 5]}], "distance": 10, "direction": "negative", "operation": "join"}}
 ]}