<style>
.bar {
width: 25px;
height: 100px;
display: inline-block;
background-color: blue;
}
</style>
<body>
<script>
const dataset = [12, 31, 22, 17, 25, 18, 29, 14, 9];
d3.select("body").selectAll("div")
.data(dataset)
.enter()
.append("div")
// Add your code below this line
.attr("class","bar")
.attr("div","bar")
// Add your code above this line
</script>
</body>