Александр

<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.25.0/babel.min.js"></script>

<script type="text/babel">
/*сюда пишим код*/
</script>

.cont{
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;

  height: 100px;
}
.item{
  flex: 1 1 25%;
}