flex 布局 横向滚动

<div style="padding: 15px; background-color: white; display: flex">
    <div style="flex-basis: 200px; flex-shrink: 0; background-color: #42b983"></div>
    <div style="flex-basis: 100%; background-color: #cccccc; height: 500px; padding: 15px; overflow: hidden ">
        <div style="overflow: auto;">
            <div style="height: 100px; width: 3000px; background-color: #F5222E"></div>
        </div>
    </div>
</div>