I really like your twin story! It is a perfect example of coherence principle because the pictures and text are well balanced. Moreover, the principle you have mentioned is mostly alike with mine. Expect I forgot the Signaling Principle.

Overall, your blog post shows Signaling Principle by bolding the text and Segmenting Principle by splitting sections. Although you have added a picture to show coherence principle, I wonder if choose a more related picture will be more helpful for reader.

Discovering Twine