* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

section {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #7289DA;
}

.call-animation {
  background: #fff;
  width: 400px;
  height: 400px;
  position: relative;
  margin: 0 auto;
  border-radius: 100%;
  border: solid 5px #fff;
  animation: play 2s ease infinite;
  -webkit-backface-visibility: hidden;
  -moz-backface-visibility: hidden;
  -ms-backface-visibility: hidden;
  backface-visibility: hidden;

}

img {
  width: 400px;
  height: 400px;
  border-radius: 100%;
  position: absolute;
  left: 0px;
  top: 0px;
}

@keyframes play {

  0% {
    transform: scale(1);
  }

  15% {
    box-shadow: 0 0 0 5px rgba(255, 255, 255, 0.4);
  }

  25% {
    box-shadow: 0 0 0 10px rgba(255, 255, 255, 0.4), 0 0 0 20px rgba(255, 255, 255, 0.2);
  }

  25% {
    box-shadow: 0 0 0 15px rgba(255, 255, 255, 0.4), 0 0 0 30px rgba(255, 255, 255, 0.2);
  }

}