The image depicts a seamless pattern of the design which includes a stylized lotus and a stylized crane.I referred to the original image in a book which is into public domain.
Source Yamachem
This one resembles a black concrete wall when is tiled. It should look great, at least with dark website themes.
Source V. Hartikainen
A heavy dark gray base, some subtle noise and a 45-degree grid makes this look like a pattern with a tactile feel to it.
Source Atle Mo
Like the name says, light and gray, with some small dots and circles.
Source Brenda Lay
A free green background pattern with a pattern of rhombuses on a seamless texture. Feel free to use it as a tiled background image on your web site.
Source V. Hartikainen
A pale orange background pattern with glossy groove stripes.
Source V. Hartikainen
CC0 and a seamless pattern from a tile drawn in Paint.net .
Source SliverKnight
Classic 45-degree pattern, light version.
Source Luke McDonald
Did anyone say The Hoff? This pattern is in no way related to Baywatch.
Source Josh Green
Prismatic Abstract Line Art Pattern Background
Source GDJ
Utilising a bird from s-light and some flowers from Almeidah. To get the unit tile, select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
A seamless pattern formed from cross 4. To get the original tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
By popular request, an outline version of the pentagon pattern.
Source Atle Mo
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ