json Circles

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
</head>

<body>
  <script>
    var jsonCircles = [
   { "x_axis": 30, "y_axis": 30, "radius": 20, "color" : "green" },
  { "x_axis": 70, "y_axis": 70, "radius": 20, "color" : "purple"},
  { "x_axis": 110, "y_axis": 100, "radius": 20, "color" : "red"}];

var svgContainer = d3.select("body").append("svg")
                                    .attr("width", 200)
                                    .attr("height", 200);

var circles = svgContainer.selectAll("circle")
                          .data(jsonCircles)
                          .enter()
                          .append("circle");

https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js