diff -r efd9c589177a -r c0b4a8b5a012 toolkit/javascript/d3/examples/clock/clock.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/javascript/d3/examples/clock/clock.js	Thu Apr 10 14:20:23 2014 +0200
@@ -0,0 +1,87 @@
+// Based on http://vis.stanford.edu/protovis/ex/clock.html
+// Based on http://blog.pixelbreaker.com/polarclock
+
+var w = 960,
+    h = 700,
+    r = Math.min(w, h) / 1.8,
+    s = .09,
+    fsec = d3.time.format("%S s"),
+    fmin = d3.time.format("%M m"),
+    fhou = d3.time.format("%H h"),
+    fwee = d3.time.format("%a"),
+    fdat = d3.time.format("%d d"),
+    fmon = d3.time.format("%b");
+
+var fill = d3.scale.linear()
+    .range(["hsl(-180, 50%, 50%)", "hsl(180, 50%, 50%)"])
+    .interpolate(d3.interpolateHsl);
+
+var arc = d3.svg.arc()
+    .startAngle(0)
+    .endAngle(function(d) { return d.value * 2 * Math.PI; })
+    .innerRadius(function(d) { return d.index * r; })
+    .outerRadius(function(d) { return (d.index + s) * r; });
+
+var vis = d3.select("#clock").append("svg:svg")
+    .attr("width", w)
+    .attr("height", h)
+  .append("svg:g")
+    .attr("transform", "translate(" + w / 2 + "," + h / 2 + ")");
+
+var g = vis.selectAll("g")
+    .data(fields)
+  .enter().append("svg:g");
+
+g.append("svg:path")
+    .style("fill", function(d) { return fill(d.value); })
+    .attr("d", arc);
+
+g.append("svg:text")
+    .attr("text-anchor", "middle")
+    .attr("dy", "1em")
+    .text(function(d) { return d.text; });
+
+
+// Update arcs.
+d3.timer(function() {
+  var g = vis.selectAll("g")
+      .data(fields);
+
+  g.select("path")
+      .style("fill", function(d) { return fill(d.value); })
+      .attr("d", arc);
+
+  g.select("text")
+      .attr("dy", function(d) { return d.value < .5 ? "-.5em" : "1em"; })
+      .attr("transform", function(d) {
+        return "rotate(" + 360 * d.value + ")"
+            + "translate(0," + -(d.index + s / 2) * r + ")"
+            + "rotate(" + (d.value < .5 ? -90 : 90) + ")"
+      })
+      .text(function(d) { return d.text; });
+});
+
+// Generate the fields for the current date/time.
+function fields() {
+  var d = new Date;
+
+  function days() {
+    return 32 - new Date(d.getYear(), d.getMonth(), 32).getDate();
+  }
+
+  var second = (d.getSeconds() + d.getMilliseconds() / 1000) / 60,
+      minute = (d.getMinutes() + second) / 60,
+      hour = (d.getHours() + minute) / 24,
+      weekday = (d.getDay() + hour) / 7,
+      date = (d.getDate() - 1 + hour) / days(),
+      month = (d.getMonth() + date) / 12;
+
+  return [
+    {value: second,  index: .7, text: fsec(d)},
+    {value: minute,  index: .6, text: fmin(d)},
+    {value: hour,    index: .5, text: fhou(d)},
+    {value: weekday, index: .3, text: fwee(d)},
+    {value: date,    index: .2, text: fdat(d)},
+    {value: month,   index: .1, text: fmon(d)},
+  ];
+}