simple pie chart for comfort

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v3.min.js"></script>
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
  </style>
</head>

<body>
  <script>
    // doesn't look d3 fancy but this is all I need for this pie chart
    var color = ['#b2182b','#ef8a62','#fddbc7','#f7f7f7','#d1e5f0','#67a9cf','#2166ac'];
    var width = 90;
    
    var svg = d3.select("body").append("svg")
      .attr("width", width)
      .attr("height", width)

// add pie chart
    var place_holder_data = [10, 10, 10, 10, 10, 10, 10];
   	var radius = width /2 ;
    
    var pie = d3.layout.pie()(place_holder_data);

var arc = d3.svg.arc()
        .innerRadius(radius / 2)
        .outerRadius(radius - 5);

var pp = svg.append("g")
        .attr("class", "pie")
        .attr("transform", "translate(" + width / 2 +", " + width / 2 +")");

pp.selectAll("path")
    	.attr("class", "pie")
      .data(pie).enter()
      	.append("path")
      		.attr("fill", function(d, i) { return color[i]; })
      		.attr("stroke", "black")
      		.attr("d", arc);

function update_pie(new_data) {
        // in my case number of values are always the same
				var pie = d3.layout.pie().value(function(d) { return d; })(new_data);
				path = d3.select(".pie").selectAll("path").data(pie); // Compute the new angles
				path.attr("d", arc); // redrawing the path
    }
  </script>
</body>

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