{
  "name": "Spiral Rainbow",
  "description": "A rotating spiral pattern with rainbow gradient",
  "layers": [
    {
      "type": "pattern",
      "pattern": "spiral",
      "color": {
        "type": "palette",
        "stops": [
          {
            "position": 0.0,
            "color": "ff0000"
          },
          {
            "position": 0.17,
            "color": "ff8800"
          },
          {
            "position": 0.33,
            "color": "ffff00"
          },
          {
            "position": 0.5,
            "color": "00ff00"
          },
          {
            "position": 0.67,
            "color": "0088ff"
          },
          {
            "position": 0.83,
            "color": "8800ff"
          },
          {
            "position": 1.0,
            "color": "ff0088"
          }
        ]
      },
      "params": {
        "centerX": 8,
        "centerY": 8,
        "arms": 5,
        "rotationSpeed": 1.0
      }
    }
  ],
  "parameters": {
    "speed": {
      "type": "range",
      "min": 0.1,
      "max": 3.0,
      "step": 0.1,
      "default": 1.0
    },
    "brightness": {
      "type": "range",
      "min": 0.1,
      "max": 1.0,
      "step": 0.1,
      "default": 1.0
    }
  }
}