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my question is there a way to fill the [n4 X n4] with n times the small [4 X 4] one.

meaning if the [4 X 4] is a

what i want to do is

a a a a

a a a a

a a a a

a a a a

n is 4 , so it's [16 X 16]

any certain function to use ? or it would have to be a For Loops to use ?