.triangles {
  transform: translate(-50%, -50%);
  height: 81px;
  width: 90px;
  position: absolute;
  left: 50%;
  top: 50%;
}

.tri {
  position: absolute;
  animation: pulse_51 750ms ease-in infinite;
  border-top: 27px solid #215A6D;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
  border-bottom: 0px;
}

.tri.invert {
  border-top: 0px;
  border-bottom: 27px solid #215A6D;
  border-left: 15px solid transparent;
  border-right: 15px solid transparent;
}

.tri:nth-child(1) {
  left: 30px;
}

.tri:nth-child(2) {
  left: 15px;
  top: 27px;
  animation-delay: -125ms;
}

.tri:nth-child(3) {
  left: 30px;
  top: 27px;
}

.tri:nth-child(4) {
  left: 45px;
  top: 27px;
  animation-delay: -625ms;
}

.tri:nth-child(5) {
  top: 54px;
  animation-delay: -250ms;
}

.tri:nth-child(6) {
  top: 54px;
  left: 15px;
  animation-delay: -250ms;
}

.tri:nth-child(7) {
  top: 54px;
  left: 30px;
  animation-delay: -375ms;
}

.tri:nth-child(8) {
  top: 54px;
  left: 45px;
  animation-delay: -500ms;
}

.tri:nth-child(9) {
  top: 54px;
  left: 60px;
  animation-delay: -500ms;
}

@keyframes pulse_51 {
  0% {
    opacity: 1;
  }

  16.666% {
    opacity: 1;
  }

  100% {
    opacity: 0;
  }
}