#It came about

This phrase is used here to mark the beginning of a new part of the story. If your language has a way for doing this, you could consider using it here. AT: "It happened that."

#the window of the ark which he had made

The phrase "which he had made" tells about the "window." Some languages may need to make this phrase a separate sentence: "Noah had made a window in the boat. It came about after forty days that he opened the window." (See: [[:en:ta:vol2:translate:figs_distinguish]])

#raven

a bird with black feathers that mainly eats the flesh of dead animals that it finds

#it flew back and forth

This means that the raven kept leaving the boat and returning.

#until the water was dried up

This can be stated in active form. AT: "until the wind dried up the water" or "until the water dried up" (See: [[:en:ta:vol2:translate:figs_activepassive]])