the last two challenges used the flex-direction property set to row.
this property can also create a column by vertically stacking the children of a flex container.
add the css property flex-direction to the #box-container element, and give it a value of column.
<style>
#box-container {
display: flex;
height: 500px;
flex-direction: column;
}
#box-1 {
background-color: dodgerblue;
width: 50%;
height: 50%;
}
#box-2 {
background-color: orangered;
width: 50%;
height: 50%;
}
</style>
<div id="box-container">
<div id="box-1"></div>
<div id="box-2"></div>
</div>
