{ "init":
  { "pixiImages":
    [ "imgBallSteel" ]
  },
  
  "model":
  { "stage":
    { "left":   0,
      "right":  600,
      "top":    0,
      "bottom": 400
    },

    "ball":
    { "r":   15,
      "x":   15,
      "y":   15,
      "vx": 200,
      "vy": 150
    }
  },

  "view":
  { "ball":
    { "image": "imgBallSteel" }
  }
}