Generate a realistic and captivating sky background for a video, featuring bright stars and Hawaii-style fireworks. It's crucial that the image avoids any artificial or cartoonish elements. The focus should be on achieving a natural and immersive look, steering clear of any elements that might compromise the authenticity of the scene. Ensure the final result is free from any exaggerated or overly dramatic details, maintaining a balance that enhances the believability of the sky backdrop