<div class="wrapper">
            <div class="box box1">1</div>
            <div class="box box2">2</div>
            <div class="box box3">3</div>
            <div class="box box4">4</div>
            <div class="box box5">5</div>
            <div class="box box6">6</div>
        </div>
body {
                margin: 0;
                padding: 0;
            }
            .wrapper {
                display: flex;
                width: 400px;
                flex-wrap: wrap;
            }
            .box {
                width: 100px;
                height: 50px;
                background-color: #333;
                color: #fff;
                display: flex;
                justify-content: center;
                align-items: center;
                font-size: 30px;
                margin: 10px;
            }
            .box2 {
                display: none;
            }

External CSS

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External JavaScript

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