Pattern 6 in the series of Mid Century Modern Stone Screens In The Historic Neighborhoods Of Las Vegas
When you build a stone screen with blocks that are the same forwards backwards and upside down, there’s really only one design you can end up with.
If you focus your eye on the center of any given block, you get the butterfly/flower.
This pattern becomes dominant if you focus on the top and bottom edges of 2 adjacent blocks.
And this pattern shows up if you focus on the side by side edge of two adjacent blocks.
3 for the price of one. Try it yourself on the top photo.