Circles in square format

CMT12 challenge = Circles on squares or circles in square format.
Looks like we are going geometric this week.
An abstract might work too.
Orbs, tiles, coasters... Whatever appeals. Post processing OK
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My CMT10 would have been very appropriate for this challenge.
Where is a circle when you need one?
My hole punch appeared to be filled with them ....
Many squares here, 2x2, 3x3 or 4x4, make your pick