Noah was a man pure of heart from the moment he was conceived, God had a plan for Noah to be a great man to love and respect god forever. He had the site that Noah would be the one who would start world in to a world order. Lamech 18:2 says "He will comfort us in the labor and painful toil of our hands cursed by the ground the land cursed."
Noah was the son Lamech, the grandson of Methuselah, the great-grandson of Enoch, and the great-great-great-great-great-great-great-grandson of Adam, the son of God. He had the great blood of Enoch and Methuselah running through him so he had a good example of the lifestyle to live. When he was 500 years old he had three children Shem, Ham, Japheth. He was righteous and blameless against the people of his time, so God picked him to be the one to follow him and rid the world of such blasphemous sinners.
Thus God told him to make the Ark.
The Ark consisted of two of every kind of animal, Male and female to replant the earth with wildlife after the flood. It was four-hundred and fifty feet long, forty-five feet high and seventy-five feet wide. He made a door of such proportion no one had seen one that size before. God told him every little detail even down to who could come on the Ark with him. Including Noah's wife, children and their wives and children.
Noah obeyed God fully to every last detail. And so, God Blessed him. He was six hundred years old when the flood came. God set the waters to rise and so the Ark and Noah floated for forty days and forty nights till one day the dove returned with a fresh picked olive tree...