title: JQuery smooth animation
body: <p>I have this animation that makes some buttons on screen 'beat'. It works fine exept one thing, the animation is too 'sharp' and not smooth, how can I smooth it?</p>
  
  <pre><code>function myFunction() {
      setInterval(function () {
          tstFnc();
      }, 1000);
  }
  
  var flag = true;
  
  function tstFnc() {
      var numM = Math.floor((Math.random() * 10) + 1);
      var stringM = '#mgf_main' + numM + ' img';
  
      $(stringM).animate({
          width: '80px',
          height: '80px'
      }, 150, function () {
          $(stringM).animate({
              width: '68px',
              height: '68px'
          }, 150, function () {
              // nothing
          });
      });
  };
  </code></pre>