সিএসএস flex-flow

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
.container {
  display: flex;
  width: 180px;
  height: 150px;
  border: 1px solid;
  gap: 5px;
  flex-flow: row wrap;
}

.container > div {
  width: 50px;
  height: 40px;
  background-color: coral;
}
</style>
</head>
<body>

<div class="container">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
  <div>6</div>
</div>

</body>
</html>