CSS flex box sample

sample05

box1
box2
box3
box4
box5

sample06

box1
box2
box3
box4
box5

sample07

box1
box2
box3
box4
box5

sample08

box1
box2
box3
box4
box5

sample09

box1
box2long
box3
box4long
box5
box1long
box2
box3long
box4
box5long