a vibrant graffiti mural that boldly displays the phrase "HEUNPP2" in a dynamic and eye- catching style. The letters should be large and multi- colored, incorporating shades of blue, green, and orange with a glossy finish. The background features abstract shapes and patterns that evoke movement, resembling fluid dynamics or waves, symbolizing the algorithm's efficiency and precision in numerical analysis. Add elements like gears and mathematical symbols subtly integrated into the design to emphasize the mathematical significance of the Heun method. The mural is set against a brick wall in an urban environment, with a bright blue sky overhead, capturing the spirit of innovation and creativity in applied mathematics