.effect-laughting {
  * {
    position: absolute;
    z-index: 4;
  }
  .sound-1 {
    height: 64px;
    rotate: -146deg;
    left: 1%;
    bottom: 31%;
    animation: effect-sound-animation 2s 1.5s linear infinite;
  }
  .sound-2 {
    height: 52px;
    rotate: -50deg;
    left: 72%;
    bottom: 64%;
    animation: effect-sound-animation 2s 1s linear infinite;
  }
  .sound-3 {
    height: 35px;
    rotate: -38deg;
    left: 62%;
    bottom: 30%;
    animation: effect-sound-animation 2s 0s linear infinite;
  }
}

@keyframes effect-sound-animation {
  0% {
    scale: 1;
  }
  50% {
    scale: 1;
  } 52% {
    scale: 2;
  }55% {
    sc2ale: 1;
  }
}