{ "canvas":
  { "width":  400,
    "height": 300
  },

  "game":
  { "fps": 50 },    

  "balls":
  { "number": 20,
    "rInit":  [10, 16], 
    "xInit":  [20, 380],
    "yInit":  [20, 280],
    "vxInit": [30, 80],
    "vyInit": [30, 80],
    
    "borderWidth": 1,
    "borderColor": "#000000",
    "color":       "#55AA55"
  }
}