Three Fluffy Creatures Build a Treehouse: Four-Panel Story

Create a funny four-part story about three fluffy creatures building a treehouse. Give the story emotional highs and lows, and end on a happy moment. Maintain each character's identity consistently across all four images, including their appearance, fluffy texture, color, relative size, and relationship with the others. Generate four images in a 16:9 format, one at a time. Advance the treehouse-building plot in every panel: they begin construction, encounter a small problem, work together to solve it, and happily complete the treehouse in the final image.