Crochet lace edgings by Nilza Souza, from her facebook photo album "Barrados". I like the all-white on top best (unfortunately it does not come with a chart), but the chart given for the blue and white in the middle is similar enough to be taken as a general guide.
Crochet Overlay Mandala No. 1 Pattern, PDF in English, Deutsch, Espanol
Crochet Overlay Mandala No. 1 Pattern PDF by CAROcreated on Etsy
Resultado de imagem para quadrados de croche passo a passo