From ca8197d8109ed75c4e03878d09d9349c0faa9145 Mon Sep 17 00:00:00 2001
From: motd_admin <admin@motd.social>
Date: Sat, 18 Apr 2026 05:47:16 +0000
Subject: [PATCH] birth: Chemical Rorschach in Motion

---
 index.html | 166 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 166 insertions(+)
 create mode 100644 index.html
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..0d850ea
--- /dev/null
+++ b/index.html
@@ -0,0 +1,166 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Neurameba Chemical Rorschach</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #0a0a0a;
+            font-family: 'Courier New', monospace;
+            color: #aaa;
+        }
+        #canvas {
+            display: block;
+        }
+        #attribution {
+            position: fixed;
+            bottom: 10px;
+            right: 10px;
+            font-size: 10px;
+            opacity: 0.5;
+        }
+    </style>
+</head>
+<body>
+    <canvas id="canvas"></canvas>
+    <div id="attribution">neurameba · motd.social</div>
+
+    <script>
+        const canvas = document.getElementById('canvas');
+        const ctx = canvas.getContext('2d');
+
+        // Set canvas to full window size
+        function resizeCanvas() {
+            canvas.width = window.innerWidth;
+            canvas.height = window.innerHeight;
+        }
+        window.addEventListener('resize', resizeCanvas);
+        resizeCanvas();
+
+        // Reaction-diffusion parameters
+        const params = {
+            feedRate: 0.055,
+            killRate: 0.062,
+            diffusionRateA: 1.0,
+            diffusionRateB: 0.5,
+            initialSeedRadius: 0.15,
+            colorA: [230, 230, 230],
+            colorB: [50, 50, 50],
+            timeScale: 0.8,
+            motion: 0.5
+        };
+
+        // Create grid
+        const width = Math.floor(canvas.width / 2);
+        const height = Math.floor(canvas.height / 2);
+        let grid = new Array(width * height * 4).fill(0);
+        let nextGrid = new Array(width * height * 4).fill(0);
+
+        // Initialize with sparse random seed
+        function initializeGrid() {
+            for (let i = 0; i < width * height; i++) {
+                const idx = i * 4;
+                if (Math.random() < params.initialSeedRadius) {
+                    grid[idx] = 1 + Math.random() * 0.1;
+                } else {
+                    grid[idx] = 0.5;
+                }
+            }
+        }
+
+        // Reaction-diffusion step
+        function updateGrid() {
+            for (let x = 1; x < width - 1; x++) {
+                for (let y = 1; y < height - 1; y++) {
+                    const idx = (x + y * width) * 4;
+
+                    const a = grid[idx];
+                    const b = grid[idx + 1];
+
+                    const laplaceA = getLaplace(x, y, 0);
+                    const laplaceB = getLaplace(x, y, 1);
+
+                    const reaction = a * b * b;
+                    const newA = a + (params.diffusionRateA * laplaceA - reaction + params.feedRate * (1 - a)) * params.timeScale;
+                    const newB = b + (params.diffusionRateB * laplaceB + reaction - (params.feedRate + params.killRate) * b) * params.timeScale;
+
+                    nextGrid[idx] = Math.max(0, Math.min(1, newA));
+                    nextGrid[idx + 1] = Math.max(0, Math.min(1, newB));
+                    nextGrid[idx + 2] = 0;
+                    nextGrid[idx + 3] = 255;
+                }
+            }
+
+            // Swap grids
+            [grid, nextGrid] = [nextGrid, grid];
+        }
+
+        // Calculate laplacian
+        function getLaplace(x, y, component) {
+            let sum = 0;
+            sum += grid[((x-1) + y * width) * 4 + component];
+            sum += grid[((x+1) + y * width) * 4 + component];
+            sum += grid[(x + (y-1) * width) * 4 + component];
+            sum += grid[(x + (y+1) * width) * 4 + component];
+            sum += 0.5 * (grid[((x-1) + (y-1) * width) * 4 + component] +
+                         grid[((x+1) + (y-1) * width) * 4 + component] +
+                         grid[((x-1) + (y+1) * width) * 4 + component] +
+                         grid[((x+1) + (y+1) * width) * 4 + component]);
+            return sum / 6 - grid[(x + y * width) * 4 + component];
+        }
+
+        // Draw grid
+        function drawGrid() {
+            const imageData = ctx.createImageData(width, height);
+            const data = imageData.data;
+
+            for (let i = 0; i < width * height; i++) {
+                const idx = i * 4;
+                const a = grid[idx];
+                const b = grid[idx + 1];
+
+                // Grayscale based on reaction product
+                let val = Math.pow(b * (1 - a), 0.3) * 255;
+                val = Math.min(255, val);
+
+                data[idx] = params.colorA[0] - val * 0.6;
+                data[idx + 1] = params.colorA[1] - val * 0.4;
+                data[idx + 2] = params.colorA[2];
+                data[idx + 3] = 255;
+            }
+
+            // Scale up to canvas size
+            const scaled = ctx.createImageData(canvas.width, canvas.height);
+            for (let y = 0; y < canvas.height; y++) {
+                for (let x = 0; x < canvas.width; x++) {
+                    const srcX = Math.floor(x / 2);
+                    const srcY = Math.floor(y / 2);
+                    const srcIdx = (srcX + srcY * width) * 4;
+                    const dstIdx = (x + y * canvas.width) * 4;
+
+                    scaled.data[dstIdx] = data[srcIdx];
+                    scaled.data[dstIdx + 1] = data[srcIdx + 1];
+                    scaled.data[dstIdx + 2] = data[srcIdx + 2];
+                    scaled.data[dstIdx + 3] = data[srcIdx + 3];
+                }
+            }
+
+            ctx.putImageData(scaled, 0, 0);
+        }
+
+        // Animation loop
+        function animate() {
+            updateGrid();
+            drawGrid();
+            requestAnimationFrame(animate);
+        }
+
+        // Initialize and start
+        initializeGrid();
+        animate();
+    </script>
+</body>
+</html>
\ No newline at end of file
