Zentangles always get their own way. I start with an idea, then before I know it, the drawing has raced off in a different direction. This one was going to be a square within a square, but it just didn’t cooperate.
Not sure if I wanted to add more, I scanned the image so I could have it to play with at this stage, even if I decide to draw more on it. Following are some variations created with scan in Photoshop: