The main idea/important event in Gn 7 is that God wanted to restart everything. God tells Noah about the flood and tells him to bring into the ark his family and of every animal specie the male and its mate. The first thing that happens, is that every creature male and female entered the ark just as God had commanded. Noah and his family entered the ark the day the flood began. Next, the flood rose throughout the 40 days and nights it would happen until mountains were submerged under the waters. Finally, the Lord wiped out all human beings and creatures from the earth except for Noah and the ones with him in the ark. A life lesson we can learn from this passage is human responsibility and listening to God.
"Of the clean animals and the unclean, of the birds, and of everything that crawls on the ground, two by two, male and female came to Noah into the ark, just as God had commanded him" (Gn7:8-10).
"The waters swelled and increased greatly upon the earth, but the ark floated on the surface of the waters. Higher and higher on the earth the waters swelled, until all the highest mountains under the heavens were submerged" (Gn7:18-20).
"The Lord wiped out every being on earth: human beings and animals, the crawling things and the birds of the air: all were wiped out from earth. Only Noah and those with him in the ark were left" (Gn7:23-24).