The paintings where used as way of communication what era is this

Some of the oldest forms of human communication include talking or making sounds, drawing or painting, dancing, acting, and using symbols. Stone Age ad Stone age people communicated by morse code, but instead of banging sticks together they blew enormous stone spherical trombones which they pushed about like giant balls. ... Stone age people were fitted not just because there was no processed food, but also because communication involved the rolling of rocks.

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