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

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f4f4f4;
}

.container {
  display: flex;
  flex-wrap: wrap;
  align-content: space-between; /* Try values like 'flex-start', 'flex-end', 'center', 'space-around', 'stretch' */
  width: 300px;
  height: 300px;
  border: 2px dashed #333;
  background-color: #fff;
  padding: 10px;
}

.item {
  width: 80px;
  height: 80px;
  background-color: #61dafb;
  margin: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  color: white;
  font-weight: bold;
  border-radius: 5px;
}