how to create seprate flex box for adding items into the box

Flexbox properties:
1.flex-direction
2.flex-wrap
3.flex-flow
4.justify-content
5.align-items
6.align-content

.container {
	display: flex;
}

Anything within the container that is a block level element is
now turned into an inline element only taking up the space of 
its actual content placing all items side by side instead on
individual rows.

.container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}

.item {
  width: 32%;
  padding-bottom: 32%; /* Same as width, sets height */
  margin-bottom: 2%; /* (100-32*3)/2 */
  position: relative;
}