Thanks for all help

I have no incubator so I placed 6 eggs in a small aquarium (no water in it) and placed a light bulb above them. I also placed a dish cloth in a small dish with water in for humidity.
So far I have only 21'C where the eggs are. Should it be warmer?
Must I turn the eggs twice a day?

By the way, when I went to the hen to take the eggs away from her I found only 6 eggs

she actually moved 6 eggs under her. Is it possible that she had moved only the ones that are still alive? Can hens sense the living ones in the unhatched eggs?
Thank you for helping me! I thought Hens can naturally raise chicks but it seems as they need human help to so
