This site is French, but how hard could it be to understand? "Ensuite j’ai rassemblé mes bobines de coton et j’ai brodé au petit bonheur la chance, une couleur à la fois, comme ça." Something-something reassemble a mess of bobbins and a little boner by chance, one color of something, like so!
I was actually inspired to find an embroidery project after seeing this owl sweatshirt. If you take a template, trace it onto the fabric with an iron-on transfer pencil, and just fill in willy-nilly with random designs (here is my favorite book of basic freestyle embroidery stitches), you'll get there in time.