position1.vl

{
    "mark": {
        "size": 200,
        "x": 150,
        "type": "circle",
        "y": 150
    },
    "data": {
        "values": [
            {
                "empty": 0
            }
        ]
    },
    "$schema": "https://vega.github.io/schema/vega-lite/v3.json"
}