In pools of white, colored rings are seen. The space across, a bridge between.

I am taught without a teacher, born without a womb. I feast on old thoughts to fashion something new. I speak your tongues, mimic your hand, and paint without paint, I learn by guessing patterns, not by feeling faint. What am I?

You will find me under a bridge, you will find me in your foot. You will find me at McDonald’s but also in front of a bishop.

I stand between what’s yours and mine, I keep the peace, yet deal in crime. In prisons and manors, I may aid the guards, a border and broker, in commerce and yards.

Riddle me this batman, who sells me doesn’t want me, who buys me doesn’t use me and who uses me hasn’t a clue.