In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.

Title: Winter geese. Sentence 1: I went by the lake to observe the winter geese. Sentence 2: The sun was setting down and the geese were many. Sentence 3: I sat on the grass and waited for them to take flight. Sentence 4: After fifteen minutes, they started to move and flapped their wings.
I saw them leave as the sun was reflecting gold on their wings.