Edit in JSFiddle

<div class="btn-action" id="btn02">
  <span></span>
</div>

.btn-action {
  position: relative;
  width: 40px;
  height: 40px;
  margin: 100px auto;
  cursor: pointer;
}
.btn-action::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background-color: #00a5a0;
  transition: all ease-in-out 0.5s;
  transform-origin: 0 0;
}
.btn-action::after {
  content: '';
  display: block;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background-color: #00a5a0;
  transition: all ease-in-out 0.5s;
  transform-origin: 0 100%;
}
.btn-action span{
  display: block;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background-color: #00a5a0;
  transition: all ease-in-out 0.5s;
}
#btn02.active::before,
#btn02.active::after {
  width: 20px;
}
#btn02.active::before {
  -webkit-transform: translate(-1px, 20px) rotate(-45deg);
  transform: translate(-1px, 20px) rotate(-45deg);
}
#btn02.active::after {
  -webkit-transform: translate(-1px, -20px) rotate(45deg);
  transform: translate(-1px, -20px) rotate(45deg);
}

$(function(){
  $('.btn-action').on('click', function() {
    $(this).toggleClass('active');
    return false;
  });
});