{
  "type": "minecraft:condition",
  "if_true": {
    "type": "minecraft:not",
    "invert": {
      "type": "minecraft:vertical_gradient",
      "false_at_and_above": {
        "below_top": 0
      },
      "random_name": "minecraft:bedrock_roof",
      "true_at_and_below": {
        "below_top": 5
      }
    }
  },
  "then_run": {
    "type": "minecraft:block",
    "result_state": "minecraft:bedrock"
  }
}