Ditto previous pinner's "Love!" It's inconsistently consistent...'y. It's not using a perfect pattern rhythm, and it still works. It's how so many granny square patterns work, but it standing out more here I guess because of square size and simplicity...
Tecendo Artes em Crochet: Flores - created via http://pinthemall.net
Free Solid Granny Square crochet pattern and detail pictures of the block. Join up the squares to make a bigger project or simply use it individually.