Question about oracles?

i just needed to know some things about oracles because i have to write a story about one.. 1. what is their appearance? spirit? 2. do they tell you the future themselves or do they write it on a paper? 3. where do they live? 4. who can see/hear them? 5. what does the oracle do to predict the future? does it... show more i just needed to know some things about oracles because i have to write a story about one..
1. what is their appearance? spirit?
2. do they tell you the future themselves or do they write it on a paper?
3. where do they live?
4. who can see/hear them?
5. what does the oracle do to predict the future? does it close its eyes and start twirling or something?
6. does an immortal have to pay to have their future predicted or is it free?
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