Edit in JSFiddle

<div class="btn-action" id="btn03">
  <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;
}
.btn-action::after {
  content: '';
  display: block;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 4px;
  border-radius: 4px;
  background-color: #00a5a0;
}
.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;
}
#btn03::before {
  -webkit-animation: btn03-bar01 0.75s forwards;
  animation: btn03-bar01 0.75s forwards;
}

@-webkit-keyframes btn03-bar01 {
  0% {
    top: 50%;
    -webkit-transform: translateY(-50%) rotate(45deg);
  }
  50% {
    top: 50%;
    -webkit-transform: translateY(-50%) rotate(0);
  }
  100% {
    -webkit-transform: translateY(0) rotate(0);
  }
}

@keyframes btn03-bar01 {
  0% {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
  }
  50% {
    top: 50%;
    transform: translateY(-50%) rotate(0);
  }
  100% {
    transform: translateY(0) rotate(0);
  }
}
#btn03::after {
  -webkit-animation: btn03-bar03 0.75s forwards;
  animation: btn03-bar03 0.75s forwards;
}

@-webkit-keyframes btn03-bar03 {
  0% {
    bottom: 50%;
    -webkit-transform: translateY(50%) rotate(-45deg);
  }
  50% {
    bottom: 50%;
    -webkit-transform: translateY(50%) rotate(0);
  }
  100% {
    -webkit-transform: translateY(0) rotate(0);
  }
}

@keyframes btn03-bar03 {
  0% {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
  }
  50% {
    bottom: 50%;
    transform: translateY(50%) rotate(0);
  }
  100% {
    transform: translateY(0) rotate(0);
  }
 }
 #btn03.active::before {
  -webkit-animation: active-btn03-bar01 0.75s forwards;
  animation: active-btn03-bar01 0.75s forwards;
}

@-webkit-keyframes active-btn03-bar01 {
  0% {
    -webkit-transform: translateY(0) rotate(0);
  }
  50% {
    -webkit-transform: translateY(-50%) rotate(0);
    top: 50%;
  }
  100% {
    -webkit-transform: translateY(-50%) rotate(45deg);
    top: 50%;
  }
}

@keyframes active-btn03-bar01 {
  0% {
    transform: translateY(0) rotate(0);
  }
  50% {
    transform: translateY(-50%) rotate(0);
    top: 50%;
  }
  100% {
    transform: translateY(-50%) rotate(45deg);
    top: 50%;
  }
}
#btn03.active::after {
  -webkit-animation: active-btn03-bar03 0.75s forwards;
  animation: active-btn03-bar03 0.75s forwards;
}

@-webkit-keyframes active-btn03-bar03 {
  0% {
    -webkit-transform: translateY(0) rotate(0);
  }
  50% {
    bottom: 50%;
    -webkit-transform: translateY(50%) rotate(0);
  }
  100% {
    bottom: 50%;
    -webkit-transform: translateY(50%) rotate(-45deg);
  }
}

@keyframes active-btn03-bar03 {
  0% {
    transform: translateY(0) rotate(0);
  }
  50% {
    bottom: 50%;
    transform: translateY(50%) rotate(0);
  }
  100% {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
  }
}
#btn03.active span {
  background-color: rgba(255, 255, 255, 0);
}

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