Offset square pattern variations
Essentially different-colored variations of the same offset square pattern. In these pictures, half of the smallest squares in this pattern are not held in, and only stay in place due to gravity. The other half can be connected in securely.

However.... the loose squares can be easily connected to a plate behind the pattern. A 2x2 brick will fit in nicely. More ideally, it would be two 2x2 plates topped off with a 2x2 tile.
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