grid
they are like polygons in a pattern like 121212121 or triangle square triangle square.
What comes next like square circle triangle square circle triangle
Serial
Dare I say it? They look like squares!
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slanted square
Like a football
Because I like them.
Nomad
Square layout that looks like the game board. A chess board & many other things like tablecloths can have the same pattern.
Sounds like a rhombus
ukase if you are doing the telegraph crossword