body {
  background-color: #094158;
  color: #fff;
}

.pulse {
  position: relative;
  top: 50%;
  left: 50%;
  width: 64px;
  height: 64px;
  color: #fff;
}

.pulse img {
    height: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

.pulse span,
.pulse:before,
.pulse:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border: 0 solid #fff;
  border-radius: 100%;
  animation: pulse 2s ease-in-out 0s infinite;
}

.pulse span {
  border-width: 1px;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
}

.pulse :before {
  border-color: darken(#fff, 5%);
  border-width: 2px;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}

.pulse:after {
  border-color: darken(#fff, 10%);
  border-width: 2px;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0;
  }
  48%,
  52% {
    transform: scale(1.25);
    opacity: 1;
  }
}