Maybe just use a really thick font and bad kerning to have the repeated 'In God We Trust' words as a line. Then use that repeated message to outline other words. Here's a really terrible example: https://imgur.com/a/Vwd5uho
I'm sure a judge (and the principal) will say the "Hi" example you give violates the "no other information" requirement.
You will need "a representation of the United States flag centered under the national motto."
The same judge/principal will likely interpret "the national motto" to mean there is only one instance of the motto, and thereby reject repeated copies of the motto.
