Ruby's first block is the right hand side of my third pic, and if you do a half-drop repeat with those blocks you get the left hand illustration.
Her middle block would make either of the layouts in my second illustration, depending on how the blocks are rotated.
Her third block looks diagonal, but repeat it several times and it looks rather different. Keeping all the blocks the same way around it will be like the left hand part of this pic, rotate alternate blocks 90 degrees and it will be like the right hand side of the pic.