Squares and pattern... when I saw the work of John Conway, Game Life, I thought to use some of the images that produces this program to create patterns... Yet I don't know actually how make this, but I'm thinking... :-)
These pages about pattern in an old book by Lewis F. Day, 1923, London, B. T. Batsford explain some possibilities of the squares. [Design Pattern - Lewis F. Day - 1923]
From Wikipedia [Conway's Game of Life]
The Game of Life, also known simply as Life, is a cellular automaton devised by the British mathematician John Horton Conway in 1970. It is the best-known example of a cellular automaton.