This monochrome train is a wonder to behold! It is a towering locomotive, composed of many majestic cars of varying sizes connected together. The engine is a strong, robust beast that can pull any number of cars up to much length. The weathered steel of the engine glints ferociously in the light, and the entire structure radiates a proud, robust strength. To best capture the vibrancy of this scene, I would color the train in shades of grey - from lighter to darker as it moves from the engine to the farthest car. To give the effect of rust, I would dust the edges of the locomotive and cars with warm brown and burnt oranges. A light pink in the sky makes the sight of this grand train even more beautiful!