Pendulam Christmas Balls Bells Swing CSS3 animation

HTML

<div>
    <img id="ball" class="bellImg" src="https://s5.postimg.org/t6niwhpuf/xmas1.png" >
    <img id="ball" class="bellImg1" src="https://s5.postimg.org/o99ybdnvb/xmas2.png" >
    <img id="ball" class="bellImg2" src="https://s5.postimg.org/p02oh5q8n/xmas3.png" >
</div>

CSS

.bellImg {
    
    width: 48px;
  position: absolute;
  right: 10px;
  top: 18px;
  -webkit-animation-name: rotate;
  animation-delay: 0s;
  -webkit-animation-duration: 3s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-direction: normal;
  -webkit-transform-origin: 50% 0%;
  -webkit-animation-timing-function: linear;  /* or make your custom easing */
}
.bellImg1
{
  
  width: 31px;
  position: absolute;
  right: 10px;
  top: 18px;
  -webkit-animation-name: rotate;
  animation-delay: 0s;
  -webkit-animation-duration: 2s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-direction: normal;
  -webkit-transform-origin: 50% 0%;
  -webkit-animation-timing-function: linear;  /* or make your custom easing */
}
.bellImg2 {
  
    width: 48px;
  position: absolute;
  right: 10px;
  top: 18px;
  -webkit-animation-name: rotate;
  animation-delay: 0s;
  -webkit-animation-duration: 4s;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-direction: normal;
  -webkit-transform-origin: 50% 0%;
  -webkit-animation-timing-function: linear;  /* or make your custom easing */
}
@-webkit-keyframes rotate {
  0% {
    -webkit-transform: rotate(0deg);
  }
  25% {
    -webkit-transform: rotate(10deg);
  }
  75% {
    -webkit-transform: rotate(-10deg);
  }
  100% {
    -webkit-transform: rotate(0deg);
  }
}