Drawing SVG Shapes with D3 Drawing Shapes w/ D3 - // source http://jsbin.com/kamik

<!DOCTYPE html>
<html>
<head>
  <meta name="description" content="Drawing Shapes w/ D3 - " />
  <meta charset="utf-8">
  <title>Drawing SVG Shapes with D3</title>
  <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
</head>
<body>
  
<script id="jsbin-javascript">
var w = 300;
var h = 120;
var padding = 2;
var dataset = [ 5, 10, 13, 19, 21, 25, 
                11, 25, 22, 18, 7];
var svg = d3.select("body").append("svg")
          .attr("width", w)
          .attr("height", h);

function colorPicker(v) {
  if (v<=20) { return "#666666"; }
  else if (v>20) { return "#FF0033"; }
}

svg.selectAll("rect")
  .data(dataset)
  .enter()
  .append("rect")
  .attr({
    x: function(d, i) {return i * (w / dataset.length);},
    y: function(d) {return h - (d*4);},
    width: w / dataset.length - padding,
    height: function(d) {return d*4;},
    fill: function(d) {return colorPicker(d);}
  });

svg.selectAll("text")
  .data(dataset)
  .enter()
  .append("text")
  .text(function (d) { return d; })
  .attr({
    "text-anchor": "middle",
    x: function(d, i) {return i * (w / dataset.length)+(w / dataset.length - padding) / 2;},
    y: function(d) { return h - (d*4)+14; },
    "font-family": "sans-serif",
    "font-size": 12,
    "fill": "#ffffff"
  });
</script>

function colorPicker(v) {
  if (v<=20) { return "#666666"; }
  else if (v>20) { return "#FF0033"; }
}

Modified http://d3js.org/d3.v3.min.js to a secure url

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