text: function incrementalUpdate ()
  {
    var target = speedometer.value () < speedometer.max () ?
        speedometer.max () : speedometer.min ();
  
    speedometer.animatedUpdate (target, 5000);
  }
  
  function randomUpdate ()
  {
    var target = Math.random () * speedometer.max ();
    var time = Math.random () * 5000;
  
    speedometer.animatedUpdate (target, time);
  }
  
  function stopAnimation ()
  {
    speedometer.stopAnimation ();
  }
  