Two groups of nodes

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<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="//d3js.org/d3.v3.min.js"></script>
<script>

var width = 960,
    height = 500,
    padding = 2,
    clusterPadding = 20, 
    maxRadius = 12;

var n = 1328, 
    m = 2;

var color = d3.scale.category10()
    .domain(d3.range(m));

var clusters = new Array(m);

var nodes = d3.range(n).map(function() { 
  var i = Math.floor(Math.random() * m),
      r = 3,
      d = {
        cluster: i,
        radius: r,
        x: Math.cos(i / m * 2 * Math.PI) * 200 + width / 2 + Math.random(),
        y: Math.sin(i / m * 2 * Math.PI) * 200 + height / 2 + Math.random()
      };
  if (!clusters[i] || (r > clusters[i].radius)) clusters[i] = d;
  return d;
});

var force = d3.layout.force()
    .nodes(nodes)
    .size([width, height])
    .gravity(.02)
    .charge(0)
    .on("tick", tick)
    .start();

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

var node = svg.selectAll("circle")
    .data(nodes)
  .enter().append("circle")
    .style("fill", function(d) { return color(d.cluster); })
    .call(force.drag);

node.transition()
    .duration(100)
    .delay(function(d, i) { return i * 5; })
    .attrTween("r", function(d) {
      var i = d3.interpolate(0, d.radius);
      return function(t) { return d.radius = i(t); };
    });

function tick(e) {
  node
      .each(cluster(10 * e.alpha * e.alpha))
      .each(collide(.5))
      .attr("cx", function(d) { return d.x; })
      .attr("cy", function(d) { return d.y; });
}

svg.append("rect")
        .attr("x", 725)             
        .attr("y", 90)
        .attr("width", 10)
        .attr("height",10)
        .style("fill","orange")

svg.append("text")
        .attr("x", 795)             
        .attr("y", 99)
        .attr("text-anchor", "middle")  
        .style("font-size", "10px")
        .style("font-family","sans-serif")
        .text("Nodes which are not blue")

</script>

https://d3js.org/d3.v3.min.js