D3 Examples - SVGs and circles

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>
​
<body>
  <script>
    // Feel free to change or delete any of the code you see in this editor!
    var dataSet = [5,2,3,4,5,6,6,3,2];
    
    var svg = d3.select("body")
                            .append("svg")
                            .attr("width",500).attr("height",500);
    
    var circles = svg.selectAll("circle")
      .data(dataSet)
      .enter()
        .append("circle")
    
    circles
      .attr("cx",function(d, i){
        return i*50 + 25 + "px"
        })
        .attr("cy",function(d,i){
        return d*i*10 + 100 + "px"
        })
        .attr("r", function(d){
        return d*2 + "px"
        })
        .attr("fill","orange")
        .attr("stroke","red")
        .attr("stroke-width",5)
​
  </script>
</body>
​
    