<div class="container">
    <div class="item">1</div>
    <div class="item">2</div>
    <div class="item">3</div>
    <div class="item">4</div>
</div>

.container {
    display: flex;
}

.item {
    width: 50px;
    height: 50px;
}

.item:nth-child(1) {
    background-color: #fff001;
    order: 3;
}

.item:nth-child(2) {
    background-color: #00a5e7;
    order: 2;
}

.item:nth-child(3) {
    background-color: #00984b;
    order: 5;
}

.item:nth-child(4) {
    background-color: #cd5638;
    order: 1;
}

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.