Hiding words in pattern

In thinking about ways to put pattern into pattern, so that there was a hidden pattern which was not very noticeable against the obvious pattern, I started thinking of putting words or messages into my pieces, possibly using code to hide them. after looking at codes like morse code, I found the braille alphabet. Braille uses raised dots, each letter a different combination of dots, in a 2 x 3 grid. I thought I could use this alphabet with my folded squares, and make the letters using different coloured squares or a different material.