Could remind you a bit of those squares in Super Mario Bros, yeh?
Source Jeff Wall
A dark background pattern/texture of a dimpled metal plate.
Source V. Hartikainen
Psychedelic Geometric Background No Black
Source GDJ
A seamless pattern formed from a square tile. The tile can be retrieved by selecting the rectangle in Inkscape and using shift-alt-I. Version with black background.
Source Firkin
This one is amazing, truly original. Go use it!
Source Viahorizon
Remixed from a drawing in 'Paul's Sister', Frances Peard, 1889.
Source Firkin
Seamless pattern the tile for which can be had by using shift-alt-I on the selected rectangle in Inkscape.
Source Firkin
Here's a seamless brown cork board background texture. Feel free to download or reshare if you like.
Source V. Hartikainen
From a drawing in 'Real Sailor-Songs', John Ashton, 1891.
Source Firkin
Looks like an old wall. I guess that’s it then?
Source Viahorizon
The basic shapes never get old. Simple triangle pattern.
Source Atle Mo
Drawn in Paint.net and vectorised in Vector Magic
Source Firkin
It’s a hole, in a pattern. On your website. Dig it!
Source Josh Green
Abstract Tiled Background Extended 11
Source GDJ
A seamless paper background texture colored in pale yellow. This seamless texture is ideal for those who need a yellow background image for their website. The texture resembles paper.
Source V. Hartikainen
Sounds French. Some 3D square diagonals, that’s all you need to know.
Source Graphiste
A set of paper filters. The base texture is generated the same way, only the compositing mode is varied.
Source Lazur URH
Very dark pattern with some noise and 45-degree lines.
Source Stefan Aleksić
Dark pattern with some nice diagonal stitched lines crossing over.
Source Ashton
Prismatic Polka Dots 3 No Background
Source GDJ
A seamless paper background colored in pale yellow.
Source V. Hartikainen
Abstract Ellipses Background Grayscale
Source GDJ