{
  "type": "survivalplus:backrooms_type",
  "generator": {
    "type": "minecraft:flat",
    "settings": {
      "biome": "survivalplus:backrooms",
      "layers": [
        {
          "block": "minecraft:stripped_bamboo_block",
          "height": 20
        },
        {
          "block": "minecraft:grass_block",
          "height": 1
        }
      ]
    }
  }
}