<div id="rodzic">
    <div id="dziecko">
    </div>
</div>

<style>
#rodzic{
    overflow: auto;
    background-image: url(https://www.clipartsgram.com/image/1657195726-freehexapatterncc0byblacklightstudio-d4ig12f.png);
    background-color: red;
    height: 500px;
    width: 500px;
}

#dziecko{
    height: 200px;
    width: 500px;
    margin-top: 100px;
    background-color: blue;
}
</style>