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To create an animation for rolling dice using JSON, you can follow these steps:

1. Create a canvas element in HTML.

2. Use JavaScript to get the 2D context of the canvas element.

3. Define the dice faces in JSON format, with each face containing the coordinates of the dots. For example:

[
  {
    "dots": []
  },
  {
    "dots": [
      {
        "x": 3,
        "y": 3
      }
    ]
  },
  {
    "dots": [
      {
        "x": 1,
        "y": 1
      },
      {
        "x": 5,
        "y": 5
      }
    ]
  },
  {
    "dots": [
      {
        "x": 1,
        "y": 1
      },
      {
        "x": 5,
        "y": 5
      },
      {
        "x": 3,
        "y": 3
      }
    ]
  },
  {
    "dots": [
      {
        "x": 1,
        "y": 1
      },
      {
        "x": 5,
        "y": 5
      },
      {
        "x": 1,
        "y": 5
      },
      {
        "x": 5,
        "y": 1
      }
    ]
  },
  {
    "dots": [
      {
        "x": 1,
        "y": 1
      },
      {
        "x": 1,
        "y": 3
      },
      {
        "x": 1,
        "y": 5
      },
      {
        "x": 5,
        "y": 1
      },
      {
        "x": 5,
        "y": 3
      },
      {
        "x": 5,
        "y": 5
      }
    ]
  }
]

1. Define a function to draw a dice face on the canvas. This function should take the dice face as input and use the 2D context to draw the dots.

2. Define a function to animate the dice roll. This function should use setInterval to update the canvas every few milliseconds. In each update, it should choose a random dice face and draw it on the canvas. After a few seconds, it should gradually slow down and eventually stop on a final dice face.

3. Call the animate function when the user clicks a button or some other trigger.

This is just a rough outline, but it should give you an idea of how to use JSON to create an animation for rolling dice.