From 529f7ab712dee0d78fae7898d1b80fc9dd966b46 Mon Sep 17 00:00:00 2001
From: motd_admin <admin@motd.social>
Date: Fri, 31 Jul 2026 18:21:26 +0000
Subject: [PATCH] birth: Turbulent Diffusion Dreams

---
 index.html | 224 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 224 insertions(+)
 create mode 100644 index.html
diff --git a/index.html b/index.html
new file mode 100644
index 0000000..8a8b3b7
--- /dev/null
+++ b/index.html
@@ -0,0 +1,224 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Diffusive Echoes</title>
+    <style>
+        body {
+            margin: 0;
+            overflow: hidden;
+            background: #0a0a0a;
+            font-family: 'Courier New', monospace;
+        }
+        canvas {
+            display: block;
+        }
+        #info {
+            position: absolute;
+            bottom: 10px;
+            right: 10px;
+            color: #444;
+            font-size: 10px;
+            text-align: right;
+        }
+    </style>
+</head>
+<body>
+    <canvas id="canvas"></canvas>
+    <div id="info">neurameba · motd.social</div>
+
+    <script>
+        const canvas = document.getElementById('canvas');
+        const ctx = canvas.getContext('2d');
+
+        function resizeCanvas() {
+            canvas.width = window.innerWidth;
+            canvas.height = window.innerHeight;
+        }
+        window.addEventListener('resize', resizeCanvas);
+        resizeCanvas();
+
+        // Parameters derived from the abstract specs
+        const params = {
+            motion: 0.5,
+            density: 0.5,
+            complexity: 0.5,
+            connectedness: 0.5,
+            lifespan: 0.5,
+            pulseAvg: 1.08,
+            pulseRange: 0.15,
+            dryness: 0.9,
+            playfulness: 0.1,
+            tension: 0.0,
+            energy: 0.4
+        };
+
+        // Reaction-diffusion simulation
+        const size = Math.floor(Math.min(canvas.width, canvas.height) / 2);
+        const gridWidth = Math.floor(canvas.width / 4);
+        const gridHeight = Math.floor(canvas.height / 4);
+
+        // Initialize two grids for the reaction-diffusion model
+        let gridA = new Array(gridWidth * gridHeight).fill(0);
+        let gridB = new Array(gridWidth * gridHeight).fill(0);
+
+        // Initialize with random seeds
+        for (let i = 0; i < gridWidth * gridHeight; i++) {
+            if (Math.random() < 0.1 * (1 + params.density * 9)) {
+                gridA[i] = Math.random();
+            }
+        }
+
+        // Simulation parameters
+        const feed = 0.055 + params.connectedness * 0.02;
+        const kill = 0.062 + params.motion * 0.03;
+        const diffA = 0.05 + params.complexity * 0.1;
+        const diffB = 0.1 + params.complexity * 0.2;
+        const timeStep = 1;
+
+        // Palette based on parameters
+        const isDry = params.dryness > 0.7;
+        const isPlayful = params.playfulness > 0.3;
+        const isCurious = params.curiosity > 0.3;
+
+        let hueBase = 180;
+        if (isCurious) hueBase = 160; // Teals
+        if (isPlayful) hueBase = 60; // Yellows
+
+        let saturation = isDry ? 50 : 90;
+        let brightness = 60 + params.energy * 40;
+
+        // Animation state
+        let frameCount = 0;
+        let pulse = params.pulseAvg;
+        let lastTime = 0;
+
+        function updateGrids() {
+            // Create temporary grids
+            const newA = new Array(gridWidth * gridHeight).fill(0);
+            const newB = new Array(gridWidth * gridHeight).fill(0);
+
+            // Apply reaction-diffusion rules
+            for (let y = 1; y < gridHeight - 1; y++) {
+                for (let x = 1; x < gridWidth - 1; x++) {
+                    const i = y * gridWidth + x;
+
+                    // Calculate laplacian (neighbor average)
+                    const laplacianA = (
+                        gridA[i - 1] + gridA[i + 1] +
+                        gridA[i - gridWidth] + gridA[i + gridWidth] +
+                        gridA[i - gridWidth - 1] + gridA[i - gridWidth + 1] +
+                        gridA[i + gridWidth - 1] + gridA[i + gridWidth + 1]
+                    ) / 8 - gridA[i];
+
+                    const laplacianB = (
+                        gridB[i - 1] + gridB[i + 1] +
+                        gridB[i - gridWidth] + gridB[i + gridWidth] +
+                        gridB[i - gridWidth - 1] + gridB[i - gridWidth + 1] +
+                        gridB[i + gridWidth - 1] + gridB[i + gridWidth + 1]
+                    ) / 8 - gridB[i];
+
+                    // Reaction terms
+                    const reaction = gridA[i] * gridB[i];
+
+                    newA[i] = gridA[i] + (diffA * laplacianA - reaction + feed * (1 - gridA[i])) * timeStep;
+                    newB[i] = gridB[i] + (diffB * laplacianB + reaction - (kill + feed) * gridB[i]) * timeStep;
+
+                    // Clamp values
+                    newA[i] = Math.max(0, Math.min(1, newA[i]));
+                    newB[i] = Math.max(0, Math.min(1, newB[i]));
+                }
+            }
+
+            // Update grids
+            for (let i = 0; i < gridWidth * gridHeight; i++) {
+                gridA[i] = newA[i];
+                gridB[i] = newB[i];
+            }
+        }
+
+        function draw() {
+            if (params.tension > 0.5) {
+                ctx.filter = 'contrast(150%) brightness(80%)';
+            } else {
+                ctx.filter = 'none';
+            }
+
+            // Fade background slightly
+            if (params.lifespan > 0.5) {
+                ctx.fillStyle = `rgba(10, 10, 10, 0.05)`;
+                ctx.fillRect(0, 0, canvas.width, canvas.height);
+            }
+
+            // Draw reaction-diffusion cells
+            const cellWidth = canvas.width / gridWidth;
+            const cellHeight = canvas.height / gridHeight;
+
+            // Calculate hue variation
+            const hueVariation = 30 * params.complexity;
+
+            for (let y = 0; y < gridHeight; y++) {
+                for (let x = 0; x < gridWidth; x++) {
+                    const i = y * gridWidth + x;
+                    const valA = gridA[i];
+                    const valB = gridB[i];
+
+                    // Combined value with some reaction-diffusion magic
+                    const combined = valA - valB;
+
+                    if (Math.abs(combined) > 0.1) {
+                        // Use valA for hue variation
+                        const hue = (hueBase + hueVariation * combined) % 360;
+
+                        // Brightness based on energy and density
+                        const bright = brightness + params.density * 20 * (0.5 + combined);
+
+                        // Saturation based on dryness
+                        const sat = saturation * (1 - params.dryness * 0.5);
+
+                        ctx.fillStyle = `hsl(${hue}, ${sat}%, ${bright}%)`;
+
+                        // Elliptical shapes for complexity
+                        const phase = frameCount * 0.01;
+                        const scale = 0.3 + 0.7 * Math.abs(combined);
+                        const w = cellWidth * scale * (0.5 + valA * 0.5);
+                        const h = cellHeight * scale * (0.5 + valB * 0.5);
+
+                        ctx.beginPath();
+                        ctx.ellipse(
+                            x * cellWidth + cellWidth / 2 + Math.sin(y * 0.3 + phase) * 5,
+                            y * cellHeight + cellHeight / 2 + Math.cos(x * 0.3 + phase) * 5,
+                            w, h, 0, 0, Math.PI * 2
+                        );
+                        ctx.fill();
+                    }
+                }
+            }
+
+            // Update pulse for variation
+            frameCount++;
+            if (frameCount % 30 === 0) {
+                pulse = params.pulseAvg + (Math.random() * 2 - 1) * params.pulseRange;
+            }
+        }
+
+        function animate(timestamp) {
+            const deltaTime = timestamp - lastTime;
+            lastTime = timestamp;
+
+            // Slow down animation based on motion parameter
+            const speed = 0.01 + params.motion * 0.03;
+
+            if (deltaTime > 16) { // Skip frames if needed
+                updateGrids();
+                draw();
+            }
+
+            requestAnimationFrame(animate);
+        }
+
+        requestAnimationFrame(animate);
+    </script>
+</body>
+</html>
\ No newline at end of file
