immigration

<!DOCTYPE html>
<meta charset="utf-8">
<div class='main-viz'>
<h1>Immigration</h1>
<canvas width="960" height="760"></canvas>
</div>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>

var canvas = document.querySelector("canvas"),
    context = canvas.getContext("2d"),
    width = canvas.width,
    height = canvas.height,
    tau = 2 * Math.PI;

var nodes = d3.range(1000).map(function(i) {
  return {
    r: 3,
    index: i,
    color: i < 10 ? "brown" : "#dddddd"  };
});

function ticked(d) {
  context.clearRect(0, 0, width, height);
  context.save();
  context.translate(width / 2, height / 2);

nodes.forEach(drawNode);
  context.restore();
}
  
  function drawNode(d) {
  context.beginPath();
  context.moveTo(d.x + d.r, d.y);
  context.arc(d.x, d.y, d.r, 0, tau);
  context.fillStyle = d.color;
  context.fill();
}
  
  function isolate(force, filter) {
    console.log(force,filter);
  var initialize = force.initialize;
  force.initialize = function() { initialize.call(force, 		nodes.filter(filter)); };
  return force;
}

</script>

https://d3js.org/d3.v4.min.js