<div class="scale"></div>
<input type="text" name="" id="">
<style>
    .scale {
        width: 100px;
        height: 100px;
        background: #DDD;
        animation: ani 1s infinite;
    }
    
    input {
        width: 400px;
        height: 20px;
        background: #13e;
        margin-top: 137px;
    }
    
    @keyframes ani {
        0% {
            transform: scale(2);
        }
        100% {
            transform: scale(3);
        }
    }
</style>
<script>
    setTimeout(function () {
        while(true){
            console.log("hello world");
        }
    }, 3000)
</script>