http://www.w3.org/TR/css3-flexbox/#order-property

[#l01]
  1. List item 1
  2. List item 2
  3. List item 3
  4. List item 4
  5. List item 5
[#l02]
  1. List item 1
  2. List item 2
  3. List item 3
  4. List item 4
  5. List item 5