CSS animations - Trying to reproduce this animation

Question

I'm trying to reproduce this animation via css https://www.instagram.com/p/CJrYX60AYqS/.

You can find my code here https://codepen.io/giulianomlodi/pen/YzGMVNE.

.container {
  position: relative;
  text-align: center;
  justify-content: center;
  align-content: center;
  animation-name: container1;
  transition: all linear;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-fill-mode: forward;
  animation-timing-function: linear;
  transform-style: preserve-3d;
  transition-delay: 1s;
}

@keyframes container1 {
  0% {}
  100% {
    filter: alpha(opacity=0);
    opacity: 0;
  }
}

.circle1 {
  position: absolute;
  height: 205px;
  width: 205px;
  border-radius: 50%;
  background: #E1E3D1;
  box-shadow: -29px 29px 58px #bfc1b2, 29px -29px 58px #fffff0;
  animation-name: circle1an1;
  transition: all linear;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  transform-style: preserve-3d;
  transition-delay: 1s;
}

@keyframes circle1an1 {
  0% {
    filter: alpha(opacity=0);
    opacity: 0;
    transform: scale(1.0);
  }
  100% {
    transform: scale(2.0);
  }
}

.circle2 {
  position: absolute;
  height: 410px;
  width: 410px;
  border-radius: 50%;
  background: #E1E3D1;
  box-shadow: -29px 29px 58px #bfc1b2, 29px -29px 58px #fffff0;
  animation-name: circle2an1;
  transition: all linear;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  transition-delay: 2s;
}

@keyframes circle2an1 {
  0% {
    transform: scale(1.0);
  }
  100% {
    transform: scale(2.0);
  }
}

.circle3 {
  position: absolute;
  height: 615px;
  width: 615px;
  border-radius: 50%;
  background: #E1E3D1;
  box-shadow: -29px 29px 58px #bfc1b2, 29px -29px 58px #fffff0;
  animation-name: circle3an1;
  transition: all linear;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  transform-style: preserve-3d;
  transition-delay: 3s;
}

@keyframes circle3an1 {
  0% {
    transform: scale(1.0);
  }
  100% {
    filter: alpha(opacity=0);
    opacity: 0;
    transform: scale(2.0);
  }
}

<div id="container1">
  <div class="circle3"></div>
  <div class="circle2"></div>
  <div class="circle1"></div>
</div>

question from:https://stackoverflow.com/questions/65828981/css-animations-trying-to-reproduce-this-animation

Answer 1

You have to adjust the seconds for delay for each of the wave. In your CSS you have the following two attributes for each wave:

  animation-duration: 2s;
  transition-delay: 2s;

You have to increase these values for all waves, so the wave goes until the end and becomes transparent. So they will start smoothly and end smoothly, like you wish.