css百叶窗效果

 <div class="a">
        <div class="b"><img src="1.jpg"></div>
        <div class="b"><img src="2.jpg"></div>
        <div class="b"><img src="3.jpg"></div>
        <div class="b"><img src="4.jpg"></div>
        <div class="b"><img src="5.jpg"></div>

    </div>

     *{
            padding: 0;
            margin: 0;
        }
        body{
            background-color: #7f8c8d;
            display: flex;
            justify-content: center;
        }
        .a{
            width: 900px;
            height: 300px;
            justify-content: center;
            align-items: center;
            display: flex;
            position: relative;
            overflow: hidden;
            top:200px
        }
        .b{
            overflow: hidden;
            transition: 1s;

        }
       .b:hover{
           flex-shrink: 0;
           flex-grow: 0;
       }
        img{
            width: 400px;
        }

效果如下：