I used some kind of cotton yarn in my stash and a hook nr 3,5 mm.
Sorry, only in Swedish! Hope I can write it in English some time! If you look at the pictures I´m sure you can see how it is made. You can also try the translate application and chose your own language.

I started follow this: Triangle Tango 12 Square
http://www.ravelry.com/patterns/library/triangle-tango-12...
This pattern did not fit my yarn so I wrote my own pattern.

My squares are 15 x 15 cm.