<a href="#tt" style="position:relative;"><img src="https://img.alicdn.com/imgextra/i2/435879320/O1CN01PKF9CC2Iibs473aaV_!!435879320.jpg" alt="A_03.jpg" />
<img class="ballon" src="https://img.alicdn.com/imgextra/i2/435879320/O1CN01uWfxjS2Iibs3kB6Wd_!!435879320.png" style="position:absolute;top: 0; left: 0;" /></a>
<style>
@keyframes scaleDraw {
            0%{
                transform: scale(1);
            }
            25%{
                transform: scale(1.1);
            }
            50%{
                transform: scale(1);
            }
            75%{
                transform: scale(1.1);
            }
        }
.ballon{
            -webkit-animation-name: scaleDraw; /*关键帧名称*/
            -webkit-animation-timing-function: ease-in-out; /*动画的速度曲线*/
            -webkit-animation-iteration-count: infinite;  /*动画播放的次数*/
            -webkit-animation-duration:2s; /*动画所花费的时间*/
        }
</style>