Is Genesis 1 structured so that there is a general category and then with what will fill it, which would be a type of Hebrew poem of parallel ideas? In this case day one (light), would relate to day four (sun, moon, and stars) while day two (sea and sky) would relate to day five (birds and sea creatures) and day three (the land & vegetation) with day six (animals and humanity). Does this indicate that it is a type of creation poem or song?