In the beginning, I thought about something like wood, fire, water, atom and so on. But that are all general idea about materialism.
As spiritualistic(or you could call idealistic) opinion, everything in the world are all comes from human's mind. We can see fire that because of our mind create the fire. we can feeling pain that because of our mind create pain first. Probably, there is nothing in the world, just like the film
Pangu（a god like Jehovah in western, and Brahma in India ） The god of creation in chinese mythology.(Pangu was laid to rest. His breath became the wind; his voice the thunder; left eye the sun and right eye the moon; his body became the mountains and extremes of the world; his blood formed rivers; his muscles the fertile lands.................)
For another word,human create the world. So, my idea is about A HUMAN CREATE THE WORLD. A human stay in a dark space, his body parts transform to the elements of the world （the mountain, stone,tree, water, grass, sun, moon, sky, light, fire and everything）. This idea also comes from the story of