body {
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background-color: #222;
}

a {
  text-decoration: none;
  text-transform: uppercase;
  font-size: 25px;
  font-family: verdana;
  color: #f6b93b;
  letter-spacing: 3px;
  padding: 25px 50px;
  position: relative;
  border: 3px solid #f6b93b;
  transition: all 0.2s;
  overflow: hidden;
}

a:before,
a:after,
span:before,
span:after {
  content: "";
  position: absolute;
  width: 25%;
  height: 100%;
  background-color: #f6b93b;
  z-index: -1;
  transition: all 0.1s;
}

a:before {
  top: 100%;
  left: 0%;
}

a:hover:before {
  top: 0;
  left: 0;
}

a:after {
  top: -100%;
  right: 0;
  transition-delay: 0.3s;
}

a:hover:after {
  top: 0;
  right: 0;
}

a span:before {
  top: -100%;
  left: 25%;
  transition-delay: 0.1s;
}

a:hover span:before {
  top: 0;
  left: 25%;
}

a span:after {
  bottom: -100%;
  right: 25%;
  transition-delay: 0.2s;
}

a:hover span:after {
  bottom: 0;
  right: 25%;
}

a:hover {
  color: #222;
}