{
    "multipart": [
        {   "apply": { "model": "block/kelp" }
        },
        {   "apply": [
                { "model": "block/kelp_extra" },
                { "model": "block/kelp_extra", "y": 90 },
                { "model": "block/kelp_extra", "y": 180 },
                { "model": "block/kelp_extra", "y": 270 }
            ]
        }
    ]
}