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>

What am I missing? I tried to add some delay but it seems that it's not taking it. I can't understand how to reproduce the wave effect because eveytime it seems that the animation it starting again not in a smoothly way.

Answer 1

I've tried with this code instead and it looks better. But there is still a problem with the delay that glitches a bit. Anyone who can give me a hint on how to solve this issue?

  .box {
    position: relative;
  }

  .circle {
    position: absolute;
    top: 50%;
    left: 50%;
  }

  @keyframes wave1 {
    0% {
      opacity: 1;
      transform: scale(0) translate(-50%, -50%);
    }

    70%,
    100% {
      opacity: 0;
      transform: scale(2) translate(-50%, -50%);
    }
  }

  @keyframes wave2 {
    0%,4%,100% {
      opacity: 0;
      transform: scale(2) translate(-50%, -50%);
    }

    5% {
      opacity: 1;
      transform: scale(0) translate(-50%, -50%);
    }
  }

  @keyframes wave3 {
    0%,18%,100% {
      opacity: 0;
      transform: scale(2) translate(-50%, -50%);
    }

    20% {
      opacity: 1;
      transform: scale(0) translate(-50%, -50%);
    }
  }

  .c1 {
    height: 350px;
    width: 350px;
    border-radius: 50%;
    background: #E1E3D1;
    box-shadow:  -29px 29px 58px #bfc1b2,
                   29px -29px 58px #fffff0;
    animation: wave1 10s infinite ease-in;
    transform-origin: top left;
  }

  .c2 {
    height: 300px;
    width: 300px;
    border-radius: 50%;
    background: #E1E3D1;
    box-shadow:  -29px 29px 58px #bfc1b2,
           29px -29px 58px #fffff0;
    animation: wave2 10s infinite ease-in;
    transform-origin: top left;
  }

  .c3 {
    height: 200px;
    width: 200px;
    border-radius: 50%;
    background: #E1E3D1;
    box-shadow:  -29px 29px 58px #bfc1b2,
                   29px -29px 58px #fffff0;
    animation: wave3 10s infinite ease-in;
    transform-origin: top left;
  }

Answer 2

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.