I agree with Prism it looks like the top is pieced together in varying sizes of sections (not blocks which are usually uniform in size. So just sew 2-6 squares together to make a section then join the sections together in the pattern you want. Your challenge will be to add strips or rectangles to your sections to have sections of equal length to sew together. But this is a scrappy design so you don't have any seams to match so just have fun with it!