These patterns are called MICRO and these are their class.
To see the appearance of the background for the website put the mouse over the pattern.
pattern graphics - class: zz
pattern graphics - class: zb
pattern graphics - class: zc
pattern graphics - class: zd
pattern graphics - class: ze
pattern graphics - class: zf
pattern graphics - class: zg
pattern graphics - class: zh
pattern graphics - class: zi
pattern graphics - class: zj
pattern graphics - class: zk
pattern graphics - class: zl
pattern graphics - class: zm
pattern graphics - class: zn
pattern graphics - class: zo
pattern graphics - class: zp
pattern graphics - class: zq
pattern graphics - class: zr
pattern graphics - class: zs
pattern graphics - class: zt
pattern graphics - class: zu
pattern graphics - class: zv
pattern graphics - class: zw
pattern graphics - class: zx
pattern graphics - class: zy
pattern graphics - class: za
pattern graphics - class: zxx
pattern graphics - class: zxy
pattern graphics - class: zyx
pattern graphics - class: zyy