Visualize a creative and layered collage themed around the year 2024. The collage exhibits various elements related to this future year like advanced technology, sustainable energy, and futuristic cityscapes. The numbers 2024 are prominently displayed at the center, artistically designed with a sleek, modern aesthetic. Each number in the '2024' is filled with different motifs like green urban landscapes, drones delivering packages, autonomous vehicles, and tall skyscrapers with solar panels. The collage has a harmonious mix of vibrant and pastel colors that evoke a sense of optimism and forward-thinking.