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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JS Bin</title>
</head>
<body>
  <svg height="1000" width="1000">
    <rect x="100" y="100" width="20" height="20"></rect>
    <rect x="200" y="200" width="40" height="40"></rect>
    <rect x="300" y="300" width="60" height="60"></rect>
  </svg>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.3/d3.min.js"></script>
  <script>

    let my_data = [1, 2, 3, 4, 5];
    let svg = d3.select('svg');

    svg.selectAll('rect')
      .data(my_data)
      .enter()
      .append('rect')
      .attr('width', function(d, i, nodes) {
        return d * 20;
      })
      .attr('height', function(d, i, nodes) {
        return d * 20;
      })
      .attr('x', function(d, i, nodes) {
        return d * 100;
      })
      .attr('y', function(d, i, nodes) {
        return d * 100;
      });

  </script>
</body>
</html>