I can't find the exact replica of this in any books (including the Jinny Beyer one with more than 4050 pieced blocks)
In one way it's a variation of courthouse steps, but with only one round of "steps"
courthouse steps quilt blockAre you going to sash between the blocks or turn them 90 degrees so the same colours arent touching when sewn together ??Here are the two ways; it definitely looks better with alternate blocks rotated.
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As soon as I saw the rotated version it started to look more familiar.
Number 12
here is a framed nine-patch. A nine patch block with a frame around it.
What you have designed is clearly a three
strip rail fence block with a frame around it.
As with most blocks the effects can vary depending on colour placement; it would look very different if the outer strips, ie the frame, were all the same colour.
Rail fence generally is a very versatile (and easy) block to make,
here are just a few variations.