Back in the Groove

I've reached the bottom....

I'm hoping it will block wider. Here's the latest schema.

If you've been keeping track, it keeps getting smaller (fewer rectangles). I'm also enjoying the few that are actual squares, like the green one, which is 18 by 18. It makes a nice break to not have to worry about doing a double decrease or increase every couple of rows, to keep the proportions.

Here are some closer looks.

I'm just a the point of defining the center chevrons. So far, I'm very pleased!