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              <div class="wrapper">
  <div class="content">
    <h1>Arclock</h1>
    <h2>Just An Arc Clock</h2>
  </div>
</div>
<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
            
          
!
            
              body {
      font-family: "Avenir", "Helvetica Neue", Helvetica, sans-serif;
      width: 100%;
      color: #000;
    }
    h1, h2 {
      text-transform: uppercase;
      text-align: center;
    }
    h1 {
      font-size: 48px;
      margin-top: 30px;
      margin-bottom: 0px;
    }
    h2 {
      font-size: 28px;
      color: #888;
    }

    /* SVG */
    svg.main {
      display: block;
      margin: 0 auto;
      margin-top: 30px;
    }
    .arc text {
      font: 10px sans-serif,
      text-anchor: middle;
    }
    .arc path {
      stroke: #fff;
    }
    .path-background {
      fill: #FCFBFD;
      stroke-width: 0px;
    }
    .path-foreground {
      fill: #011627;
    }
    .path-foreground-seconds {
      fill: #E71D36;
    }
    .label {
      font: 20px sans-serif;
      text-anchor: middle;
      fill: #011627;
    }
    .label-seconds {
      fill: #E71D36;
    }
            
          
!
            
              
    var width = 600;
    var height = 480;

    // Clock fields
    var fields = [
      { value: 60,
        size: 60,
        label: "s",
        update: function(date) { return date.getSeconds(); }
      },
      { value: 60,
        size: 60,
        label: "m:",
        update: function(date) { return date.getMinutes(); }
      },
      { value: 24,
        size: 24,
        label: "h:",
        update: function(date) { return date.getHours(); }
      }
    ];

    var arcMin = 75; // inner radius
    var arcWidth = 30; // width
    var arcPad = 1; // padding between arcs
    var cornerRadius = 14; // radius for rounded corner

    // Define arc for each field
    var arc = d3.svg.arc()
      .outerRadius(function(d, i) {
        return arcMin + ((i + 1) * arcWidth);
      })
      .innerRadius(function(d, i) {
        return arcMin + i * (arcWidth) + arcPad;
      })
      .startAngle(0)
      .endAngle(function(d, i) {
        return (d.value / d.size) * 2 * Math.PI;
      })
      .cornerRadius(function(d) {
        return cornerRadius;
      });

    var svg = d3.select(".wrapper")
      .append("svg")
      .attr("class", "main")
      .attr("width", width)
      .attr("height", height);

    var field = svg.selectAll(".field")
      .data(fields)
      .enter()
      .append("g")
      .attr("transform", function(d, i) {
        return "translate(" + width / 2 + "," + height / 2 + ")";
      })
      .attr("class", "field");

    field.append("path")
      .attr("class", "path path-background")
      .attr("d", arc);

    var path = field.append("path")
      .attr("class", function(d, i) {
        if (i === 0) {
          return "path path-foreground-seconds";
        }
        return "path path-foreground";
      });

    var label = field.append("text")
      .attr("class", function(d, i) {
        if (i === 0) {
          return "label label-seconds";
        }
        return "label";
      })
      .attr("dy", "0.35em")
      .attr("dx", function(d, i) {
        if (i === 0) {
          return "2.2em";
        }
        else if (i === 1) {
          return "0.2em";
        }
        else if (i === 2) {
          return "-2.2em";
        }
      });

    // Custom tween function draws intermediary steps of path
    function arcTween(d, i) {
      var interp = d3.interpolate({ value: d.previous }, d);
      return function(t) {
        var tmp = interp(t);
        return arc(interp(t), i);
      };
    }

    (function update() {
      var now = new Date();

      field.each(function(d) {
        d.previous = d.value;
        d.value = d.update(now);
      });

      path.transition()
        .ease("bounce")
        .duration(640)
        .attrTween("d", arcTween);

      label
        .text(function(d) {
          return d.value + d.label;
        });

      setTimeout(update, 1000 - (now % 1000));
    })();
            
          
!
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