* {
  margin: 0;
  padding: 0;
}

.box {
  width: 100px;
  height: 100px;
  margin: 50px auto;
  border-radius: 50%;
  background: #1b68f1;
  color: #fff;
  text-align: center;
  line-height: 100px;
  cursor: pointer;
  position: relative;
  box-shadow: 0 0 20px rgba(27, 104, 241, 0.6);
}

.box i {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #1b68f1;
  z-index: -1;
  border-radius: 50%;
  animation: myfirst 1.4s infinite;
}

.box em {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #1b68f1;
  z-index: -1;
  border-radius: 50%;
  animation: myfirst2 1.4s infinite;
}

@keyframes myfirst {
  0% {
    width: 100px;
    height: 100px;
    opacity: 0.8;
  }

  100% {
    width: 130px;
    height: 130px;
    opacity: 0;
  }
}

@keyframes myfirst2 {
  0% {
    width: 100px;
    height: 100px;
    opacity: 0.8;
  }

  100% {
    width: 160px;
    height: 160px;
    opacity: 0;
  }
}