diff --git a/src/features/r45-neon-signs.js b/src/features/r45-neon-signs.js
new file mode 100644
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+++ b/src/features/r45-neon-signs.js
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+// #45: neon signs on the arcade building: an OPEN sign and a pizza slice sign on the rooftop walls.
+import { PAL } from "../palette.js";
+const OPEN = ["0110111011101001", "1001101010001101", "1001111011101011", "1001100010001001", "0110100011101001"];
+export default {
+  id: "neon-signs-45",
+  order: 26,
+  layer: "mid",
+  rooms: ["rooftop", "alley"],
+  draw(g, w) {
+    const on = w.reduced || Math.sin(w.t * 1.1 + 1) > -0.95;
+    const ox = w.room === "alley" ? 150 : 158, oy = w.room === "alley" ? 60 : 120;
+    g.fillStyle = PAL.ink; g.fillRect(ox - 3, oy - 3, 38, 16);
+    for (let y = 0; y < 5; y++) for (let x = 0; x < 16; x++) if (OPEN[y][x] === "1") { g.fillStyle = on ? PAL.boss : PAL.winOff; g.fillRect(ox + x * 2, oy + y * 2, 2, 2); }
+    const px = w.room === "alley" ? 210 : 60, py = w.room === "alley" ? 58 : 108;
+    g.fillStyle = on ? PAL.pizza : PAL.winOff;
+    for (let r = 0; r < 8; r++) g.fillRect(px + r, py + r, 12 - r * 2 + r, 1);
+    g.fillStyle = on ? PAL.boss : PAL.winOff; g.fillRect(px + 4, py + 2, 2, 2); g.fillRect(px + 7, py + 4, 2, 2);
+  },
+};