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Create one landscape illustration at approximately 16:9, an austere ancient colonnade in a lavender desert, rendered as a heavily grained two colour risograph print. Use a strictly centered one point perspective. Place a small freestanding stone gateway at x50%, with its triangular pediment around y27% and its broad rounded open arch extending down to the horizon at y49%. The gateway must remain a distant architectural object, roughly 12% of the frame width, not a large foreground portal.
Run two rows of tall round classical columns from the foreground toward the gateway. The nearest columns are almost black indigo, one near each side edge, with their tops cropped beyond the image and their broad stepped circular bases around y73%. The next left column rises from y64% to y10%; a flat paper white disk sits behind its upper capital, centered near x27%, y15%, partly occluded by the shaft. The corresponding right column stands near x74%. Smaller paired columns recede inward with progressively lighter violet tones, partly dissolving into lavender haze. Preserve subtly fluted shafts, flat projecting capitals and layered round plinths. Do not connect columns with a roof.
Fill the lower half with a central indigo path made of an extremely fine pale lavender square grid, widening toward both bottom corners. The grid bends smoothly over low dune ridges rather than forming a flat floor. Leave pale lavender sand along both sides. Cast broad hard indigo column shadows diagonally across the path from upper left toward lower right. The grid remains faintly visible within the shadows. Keep the sky flat pale lavender with fine dense granular ink speckle, no clouds. Use only pale lilac, middle violet, deep electric indigo and paper white. Apply coarse porous print grain uniformly across sky, architecture and floor, retaining crisp geometric silhouettes and softened distance. No people, plants, readable text, border, watermark, extra celestial objects, metallic reflections, glossy surfaces or photorealistic stone.