{
  "name": "spawners:spiders",
  "spawners": [
    {"level": [0, 1, 2, 3, 4], "weight": 1, "potentials": [{"name": "minecraft:spider"}]},
    {"level": [0, 1, 2, 3, 4], "weight": 1, "potentials": [{"name": "minecraft:cave_spider"}]},
    {"level": [0, 1, 2, 3, 4], "weight": 1, "potentials": [{"name": "minecraft:spider"}, {"name": "minecraft:cave_spider"}]},
    {"level": [0, 1, 2, 3, 4], "weight": 1, "potentials": [
      {"name": "minecraft:spider", "weight": 1},
      {"name": "minecraft:cave_spider", "weight": 1}
    ]}
  ]
}