[class^="btn-"] {
  position: relative;
  display: block;
  overflow: hidden;
  width: 100%;
  height: 80px;
  max-width: 250px;
  margin: 1rem auto;
  text-transform: uppercase;
  border: 1px solid currentColor;
}

.btn-11 {
  position: relative;
  color: #739780;
}
.btn-11:before, .btn-11:after {
  position: absolute;
  top: 50%;
  content: '';
  width: 20px;
  height: 20px;
  background-color: #5a856a;
  border-radius: 50%;
}
.btn-11:before {
  left: -20px;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
.btn-11:after {
  right: -20px;
  -webkit-transform: translate(50%, -50%);
          transform: translate(50%, -50%);
}
.btn-11:hover {
  color: #d6e1da;
}
.btn-11:hover:before {
  -webkit-animation: criss-cross-left 0.8s both;
          animation: criss-cross-left 0.8s both;
  -webkit-animation-direction: alternate;
          animation-direction: alternate;
}
.btn-11:hover:after {
  -webkit-animation: criss-cross-right 0.8s both;
          animation: criss-cross-right 0.8s both;
  -webkit-animation-direction: alternate;
          animation-direction: alternate;
}