TITLE: BANNER & FIELD — a vexillology studio
PROMPT: Design 'BANNER & FIELD', a vexillology studio: design a flag live on a waving cloth (a canvas or SVG flag with believable wind ripple and light shading across folds). Controls: field divisions (horizontal/vertical tricolor, bend, nordic cross, canton, saltire), a palette limited to heraldic charges, and a charge library (sun, star, crescent, eagle silhouette, wave, mountain, wheel) with rules-of-tincture guidance (metal on color!) and a Flag 101 checklist that scores your design (simplicity, no text, meaningful symbolism). Palette: bright heraldic primaries on a workshop wall of pinioned historical micro-flags. Interactions: every control re-renders the waving flag instantly; wind slider changes ripple ferocity; a DAY parade preview marches tiny waving flags down a street; EXPORT downloads your flag. Civic, playful, quietly educational.
DESCRIPTION: A flag design studio on a parchment workbench: the living flag flies from a brass-tipped pole at 900×600, rendered with all six field divisions (horizontal and vertical tricolors, bend, nordic cross, canton stripes, saltire) in an eight-tincture heraldic palette, charged with a radiant sun, star, crescent, wave bars, or mountain — and continuous ripple shading (travelling sine bands of light and shadow) so the cloth always moves. A Flag 101 scorecard applies the North American Vexillological rules live — child-drawable simplicity, meaningful symbolism, 2–3 colors only, no lettering, distinctive at distance — checking or crossing each as you design; swatch clicks rotate through the three heraldic slots; a plain-language caption names your design in herald's terms ("a bend of azure, or, and gules — charged with a star"). DAY PARADE marches fourteen miniature copies of your flag down a street; EXPORT downloads the flat design as PNG.
TECHNIQUES: canvas flag renderer with six division layouts and five procedural charges, continuous sine-band ripple shading overlay recomputed per frame, rotating slot-based heraldic color assignment, live NAVA rule scorecard, mini-flag parade from cloned canvas snapshots with staggered skew keyframes, PNG export via toDataURL.
INTERACTION: Click division and charge chips; click swatches to fill the three heraldic slots in rotation; watch the checklist score live; run the parade; export your flag.