{
  "name": "steam_condenses",
  "description": "Steam in a closed chamber condenses to water over time",
  "seed": 42,
  "init_mode": "empty",
  "setup": [
    {"type": "fill_rect", "x": 100, "y": 130, "w": 20, "h": 1, "material": "stone"},
    {"type": "fill_rect", "x": 100, "y": 100, "w": 20, "h": 1, "material": "stone"},
    {"type": "fill_rect", "x": 99, "y": 101, "w": 1, "h": 29, "material": "stone"},
    {"type": "fill_rect", "x": 120, "y": 101, "w": 1, "h": 29, "material": "stone"},
    {"type": "set_cell", "x": 105, "y": 120, "material": "steam"},
    {"type": "set_cell", "x": 106, "y": 120, "material": "steam"},
    {"type": "set_cell", "x": 105, "y": 121, "material": "steam"},
    {"type": "set_cell", "x": 106, "y": 121, "material": "steam"}
  ],
  "steps": 80,
  "assertions": [
    {"type": "material_count_in_region", "x": 100, "y": 105, "w": 20, "h": 25, "material": "water", "min": 1, "max": 20}
  ]
}