<style>
        *{
            margin: 0;
            padding: 0;
        }
        .box{
            width: 200px;
            height: 200px;
            margin: 100px auto;
            perspective: 300px;
            position: relative;
        }
        .box p{
            width: 200px;
            height: 200px;
            position: absolute;
            top: 0;
            left: 0;
        }
        .box p:nth-child(1){
            background-color: red;
            transform: rotateX(-90deg) translateZ(30px);
        }
        .box p:nth-child(2){
            background-color: greenyellow;
            transform: rotateX(-80deg) translateZ(87px);
        }
        .box p:nth-child(3){
            background-color: blue;
            transform: rotateX(-67deg) translateZ(137px);
        }
    </style>

​<div class="box">
        <p></p>
        <p></p>
        <p></p>
    </div>