diff --git a/system/public/aesthetic.computer/disks/25.4.13.19.24.mjs b/system/public/aesthetic.computer/disks/25.4.13.19.24.mjs
index cd7d19431e..f352179b06 100644
--- a/system/public/aesthetic.computer/disks/25.4.13.19.24.mjs
+++ b/system/public/aesthetic.computer/disks/25.4.13.19.24.mjs
@@ -2,7 +2,14 @@
 // A drawing by @jeffrey, in the Venice Family Clinic Art Auction 2026.
 // https://vfcartauction2026.indy.auction
 
+const { sin, cos, min, floor } = Math;
+
+const AUCTION_URL =
+  "https://vfcartauction2026.indy.auction/auctions/69b8a7787068b4fb836ca387/lots/69f36e8da81585696283f5cd";
+
 let drawing;
+let t = 0;
+let pressed = false;
 
 function boot({ net: { preload }, debug }) {
   const path = debug
@@ -11,18 +18,79 @@ function boot({ net: { preload }, debug }) {
   preload(`${path}/25.4.13.19.24.webp`).then(({ img }) => (drawing = img));
 }
 
-function paint({ wipe, paste, screen }) {
-  wipe(0);
+function sim() {
+  t += 1;
+}
+
+function paint({ wipe, paste, ink, screen, num: { randIntRange } }) {
+  // Slowly cycling deep purples / indigos in the background.
+  const r = floor(8 + 10 * (1 + sin(t * 0.003)) * 0.5);
+  const g = floor(2 + 6 * (1 + sin(t * 0.0047 + 1.7)) * 0.5);
+  const b = floor(16 + 22 * (1 + sin(t * 0.0061 + 0.5)) * 0.5);
+  wipe(r, g, b);
+
   if (!drawing) return;
-  const scale = Math.min(
+
+  // Aspect-fit + breathe + a tiny press-punch when tapped.
+  const fit = min(
     screen.width / drawing.width,
     screen.height / drawing.height,
   );
+  const breath = 1 + 0.014 * sin(t * 0.018);
+  const punch = pressed ? 0.97 : 1.0;
+  const scale = fit * breath * punch;
+
+  // Lissajous drift so the painting never sits perfectly still.
+  const dx = 3 * sin(t * 0.013);
+  const dy = 2.5 * cos(t * 0.011);
+
   const w = drawing.width * scale;
   const h = drawing.height * scale;
-  const x = Math.floor((screen.width - w) / 2);
-  const y = Math.floor((screen.height - h) / 2);
+  const x = floor((screen.width - w) / 2 + dx);
+  const y = floor((screen.height - h) / 2 + dy);
+
   paste(drawing, x, y, scale);
+
+  // Sparkles drifting over the painting surface, with occasional bursts.
+  const sparkles = 3 + (sin(t * 0.04) > 0.85 ? 12 : 0);
+  const xMax = floor(x + w);
+  const yMax = floor(y + h);
+  for (let i = 0; i < sparkles; i++) {
+    const sx = randIntRange(x, xMax);
+    const sy = randIntRange(y, yMax);
+    const tone = randIntRange(200, 255);
+    const tint = randIntRange(0, 60);
+    ink(tone, tone - tint, tone, 220).point(sx, sy);
+  }
+
+  // "tap → vfc auction" hint, glinting in time with the breath.
+  const hint = "tap → vfc auction";
+  const glint = floor(140 + 70 * (1 + sin(t * 0.025)) * 0.5);
+  ink(0, 0, 0, 160).write(hint, {
+    center: "x",
+    y: screen.height - 14,
+    screen,
+  });
+  ink(glint, glint, glint, 240).write(hint, {
+    center: "x",
+    y: screen.height - 15,
+    screen,
+  });
+}
+
+function act({ event: e, net, jump, send }) {
+  if (e.is("touch")) pressed = true;
+  if (e.is("lift")) {
+    pressed = false;
+    if (net?.iframe) {
+      send({
+        type: "post-to-parent",
+        content: { type: "openExternal", url: AUCTION_URL },
+      });
+    } else {
+      jump(AUCTION_URL);
+    }
+  }
 }
 
 function meta() {
@@ -32,4 +100,4 @@ function meta() {
   };
 }
 
-export { boot, paint, meta };
+export { boot, sim, paint, act, meta };