Create a cute and friendly cartoon-style Train illustration, suitable for a 6-12 year-old children's coloring book. The Train should be viewed from a 45-degree angle, with all lines drawn in black ink, following the coloring book style. Use thicker lines for the Train's outlines and softer lines for its endearing details. Avoid using any other colors, and keep the background white with no added text. --v 5.2