.spinner {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  justify-content: space-between;
  width: 45px;
  height: 45px;
  text-align: center;
  font-size: 10px;
}

.spinner > div {
  background: linear-gradient(180deg, #77cf1b, #6ac900);
  height: 100%;
  width: 6px;
  -webkit-animation: stretchDelay 1.2s infinite ease-in-out;
  animation: stretchDelay 1.2s infinite ease-in-out;
}

.spinner .rect2 {
  -webkit-animation-delay: -1.1s;
  animation-delay: -1.1s;
}

.spinner .rect3 {
  -webkit-animation-delay: -1s;
  animation-delay: -1s;
}

.spinner .rect4 {
  -webkit-animation-delay: -0.9s;
  animation-delay: -0.9s;
}

.spinner .rect5 {
  -webkit-animation-delay: -0.8s;
  animation-delay: -0.8s;
}

@-webkit-keyframes stretchDelay {
  0%,
  40%,
  100% {
    -webkit-transform: scaleY(0.4);
  }
  20% {
    -webkit-transform: scaleY(1);
  }
}

@keyframes stretchDelay {
  0%,
  40%,
  100% {
    transform: scaleY(0.4);
    -webkit-transform: scaleY(0.4);
  }
  20% {
    transform: scaleY(1);
    -webkit-transform: scaleY(1);
  }
}