A [style, e.g. Bauhaus-inspired] poster for [event, e.g. a community robotics fair]. Top: headline "[HEADLINE]" in heavy geometric sans-serif. Middle: [illustration, e.g. a friendly robot arm stacking colored blocks]. Lower band, three columns of small print: "[Column 1 text]", "[Column 2 text]", "[Column 3 text]". Bottom strip: "[date · venue · URL]". Palette: [colors]. Crisp grid alignment, print-ready.