Engine Design Sketch: A vibrant sketch of an engine on a white background, with various lines and geometric shapes in shades of blue, yellow, and white. The dominant object is the engine itself, which appears to be a complex machine with multiple components and intricate details. A fountain pen lies on top of the drawing paper, adding a sense of creativity and artistry to the scene. In the background, there are faint outlines of other objects or tools, but they are not clearly defined. The overall impression is one of precision and attention to detail, as if the artist has carefully crafted every aspect of the engine's design. The use of bright colors adds a sense of energy and dynamism to the image, while the subtle shading and texture suggest a high level of realism.