Code (Javascript)

 <script src="../circular-progress.js"></script>
    <script>
    (function () {
      var n, id, progress;

      progress = new CircularProgress({
        radius: 20
      });

      document.body.appendChild(progress.el);

      n = 0;
      id = setInterval(function () {
        if (n == 100) clearInterval(id);
        progress.update(n++);
      }, 100);
    })();

    (function () {
      var n, id, progress;

      progress = new CircularProgress({
        radius: 40,
        lineWidth: 2,
        strokeStyle: 'black',
        initial: {
          lineWidth: 4,
          strokeStyle: 'gray'
        }
      });

      document.body.appendChild(progress.el);

      n = 0;
      id = setInterval(function () {
        if (n == 100) clearInterval(id);
        progress.update(n++);
      }, 70);
    })();

    (function () {
      var n, id, progress;

      progress = new CircularProgress({
        radius: 70,
        strokeStyle: 'black',
        lineCap: 'square',
        lineJoin: 'round',
        lineWidth: 5,
        shadowBlur: 0,
        shadowColor: 'yellow',
        text: {
          font: 'bold 15px arial',
          shadowBlur: 0
        },
        initial: {
          strokeStyle: 'white',
          lineCap: 'square',
          lineJoin: 'round',
          lineWidth: 5,
          shadowBlur: 10,
          shadowColor: 'black'
        }
      });

      document.body.appendChild(progress.el);

      n = 0;
      id = setInterval(function () {
        if (n == 100) clearInterval(id);
        progress.update(n++);
      }, 30);
    })();