{
  "model":
  {
    "stage":
    { "view":   "stage", "class": "ImmovableStage", "isMovable": false,
      "width":  "@width",
      "height": "@height"
    },

    "birds":
    [ { "@count": 25,
        "view":   "hen", "class": "MovableCircle", "isMovable": true,
        "r":      { "@min":  25, "@max": 40 },
        "x":      { "@min": 0.2, "@max": 0.8, "@relative": "@width" },
        "y":      { "@min": 0.2, "@max": 0.8, "@relative": "@height" },
        "vx":     { "@min":  50, "@max": 150, "@positive": 0.5 },
        "vy":     { "@min":  50, "@max": 150, "@positive": 0.5 }
      }
    ]
  },

  "view":
  {
    "stage":
    { "class":    "ViewTextureStage",
      "resource": "background",
      "width":    "@width",
      "height":   "@height"
    },

    "hen":
    { "class":          "ViewAnimatedBird",
      "control":        "controlBird",
      "r":              "@birdRadius",
      "animation":      [ "hen1.png", "hen2.png", "hen3.png", "hen4.png" ],
      "animationSpeed": { "@min": 0.05, "@max": 0.15 },
      "hull":           [  0, 27  ,  5, 14  , 13,  5  , 23,  1  ,
                          36,  0  , 45,  4  , 52, 13  , 63, 18  ,
                          69, 24  , 70, 33  , 60, 39  , 52, 61  ,
                          46, 67  , 36, 71  , 23, 72  , 14, 68  ,
                           5, 58  ,  0, 45
                        ],
      "start":          "play"
    }
  }
}