The flow of items within a flex container can be modified using the following CSS properties:
- flex-direction defines the direction in which the container stacks the flex items
- flex-direction: row (default behaviour)
- flex-direction: row-reverse
- flex-direction: column
- flex-direction: column-reverse
- flex-wrap specifies whether a flex item should wrap or not
- flex-wrap: nowrap; (default behaviour)
- flex-wrap: wrap;
- flex-wrap: wrap-reverse; (will wrap in reverse order)
- flex-flow sets both the flex-direction and flex-wrap

