{
  "width": 200,
  "height": 200,
  "start": { "by_name" : "main" },
  "objects": {
    "main": {
      "type": "line",
      "color": "fill",
      "tags": ["tag1","tag2"],
      "path" : [
        {"x": -50, "y": 50},
        {"x": 50, "y": 50, "sa": {"x":0, "y":0}, "sb": {"x":0, "y":0}}
      ]
    }
  }
}