.loader {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 10;
  width: 160px;
  height: 100px;
  margin-left: -80px;
  margin-top: -50px;
  border-radius: 5px;
  background: #1e3f57;
  animation: dot1_ 3s cubic-bezier(0.55,0.3,0.24,0.99) infinite;
}

.loader:nth-child(2) {
  z-index: 11;
  width: 150px;
  height: 90px;
  margin-top: -45px;
  margin-left: -75px;
  border-radius: 3px;
  background: #3c517d;
  animation-name: dot2_;
}

.loader:nth-child(3) {
  z-index: 12;
  width: 40px;
  height: 20px;
  margin-top: 50px;
  margin-left: -20px;
  border-radius: 0 0 5px 5px;
  background: #6bb2cd;
  animation-name: dot3_;
}

@keyframes dot1_ {
  3%,97% {
    width: 160px;
    height: 100px;
    margin-top: -50px;
    margin-left: -80px;
  }

  30%,36% {
    width: 80px;
    height: 120px;
    margin-top: -60px;
    margin-left: -40px;
  }

  63%,69% {
    width: 40px;
    height: 80px;
    margin-top: -40px;
    margin-left: -20px;
  }
}

@keyframes dot2_ {
  3%,97% {
    height: 90px;
    width: 150px;
    margin-left: -75px;
    margin-top: -45px;
  }

  30%,36% {
    width: 70px;
    height: 96px;
    margin-left: -35px;
    margin-top: -48px;
  }

  63%,69% {
    width: 32px;
    height: 60px;
    margin-left: -16px;
    margin-top: -30px;
  }
}

@keyframes dot3_ {
  3%,97% {
    height: 20px;
    width: 40px;
    margin-left: -20px;
    margin-top: 50px;
  }

  30%,36% {
    width: 8px;
    height: 8px;
    margin-left: -5px;
    margin-top: 49px;
    border-radius: 8px;
  }

  63%,69% {
    width: 16px;
    height: 4px;
    margin-left: -8px;
    margin-top: -37px;
    border-radius: 10px;
  }
}