Title: Copper Steampunk — Boiler Room 039 Prompt: Fire a riveted boiler room with three meshed gears, brass pipes, a glowing firebox and hissing steam over coal dark. Two valves bleed pressure, coal and oil drive the needles, and a WebAudio whistle screams on demand. Mind overpressure — she vents herself. Design: A brass-framed boiler SVG with counter-rotating gears and gauge strip beside a rounded control card with coal, oil and pitch sliders, valve toggles, whistle button and engineer log; copper, brass and coal palette with double-rule headers. Visual techniques: - Counter-rotating gear groups with oil-scaled durations and flicker lamp - Hissing steam puffs via rise keyframes and live pressure simulation - Riveted pipework, glowing firebox and double-rule brass headers - Three crew cards with three distinct edge treatments - Sawtooth whistle synthesized in WebAudio, no samples Interaction model: Coal, oil and pitch sliders drive heat, gear speed and whistle tone, valves toggle pressure bleed with log entries, whistle button and room clicks sound blasts, and overpressure auto-vents with a warning.