Street art would last because of the way people enjoy that others would take the time and patience of creating these amazing drawing and only doing it with a couple of cans of spray paint.
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Slightly uncertain of what you are asking, but you could use hand signals. You could also use sound recordings as well. Try to focus on physical senses, maybe you could even utilize food if your looking for odd ways to communicate symbols. Sign language and morse code might also be interesting to think about. I'm not sure what this is for, but I hope it helps!
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Answer: I’m kind of good at it! Why?
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