Sprite Animation Skill
Produce a single animated frame of an educational explainer — the kind you
might screen-record into a vertical video. Pixel-art mascots, big year
display, looping CSS animations, kinetic Japanese / English display type.
Workflow
-
Read the active DESIGN.md (injected above). Pick the loudest serif
token for the year, a sturdy sans for headlines, and a mono token for
timeline / index labels.
-
Pick the topic from the brief (e.g. "Nintendo · 1889 — Hanafuda").
You always need: a year, a one-line headline, an animated subject (a
pixel sprite — character, object, or icon), and a short caption.
-
Stage — full-bleed cream / off-white background (
#f5efe2) with a
subtle paper grain. Keep margins generous; this is one beat of a video.
-
Top bar — small mono row:
- Left: title slug ("名次の/番組" or "EP. 01 / NINTENDO")
- Right: progress dots ("01 / 12") and a "REC" stamp
-
Subject animations — at least three independent looping animations
on the page:
-
Big year: the headline year (e.g. "1889年") fills the lower-left,
in a serif display weight. It has a subtle vertical glitch / scanline
animation (clip-path keyframes), and a 1-frame "pop" every loop.
-
Pixel sprite card: a 96×128 pixel-art card or character (use an
inline SVG with crisp
shape-rendering: crispEdges rectangles, or a
box-shadow pixel grid). Subtle bobbing animation (±4px, 1.6s).
-
Kinetic kana: 1–2 Japanese / kanji characters that fade-and-slide
in sync with the bob (e.g. "花" — hana — flower).
-
Tick ribbon: bottom of the stage, a tape/ribbon with year ticks
(1889 · 1907 · 1949 · 1977 · 1985 · 2006 · 2017) sliding left at a
slow constant speed.
-
Caption block — small mono caption explaining the trivia:
"Nintendo started as a Hanafuda playing-card maker in Kyoto, 1889.
Mario didn't show up for another ninety-six years."
-
Write a single HTML document:
-
<!doctype html> through </html>, CSS inline, no external JS.
- All animations use
@keyframes + animation: ... infinite.
- Stage uses a fixed canvas ratio (e.g. 16:9 letterboxed) so the loop
reads as a single frame from a video.
-
data-od-id on stage, year, sprite, caption, and tick ribbon.
-
Self-check:
- The page is one cohesive scene, not a collage. The eye lands on the
year first, then the sprite, then the caption.
- At least 3 independent looping animations are visible.
- The color palette is restrained (cream + a single accent red + ink).
- No external assets — all sprites are inline SVG or CSS.
Output contract
Emit between <artifact> tags:
<artifact identifier="sprite-anim-slug" type="text/html" title="Sprite animation — Title">
<!doctype html>
<html>...</html>
</artifact>
One sentence before the artifact, nothing after.
