Update app.py

app.py

@@ -336,8 +336,8 @@ html_code = f"""
             const ctx = canvas.getContext('2d');
             for (let x = 0; x < 256; x++) {{
                 for (let y = 0; y < 256; y++) {{
-                    const value = Math.random() * 255;
-                    ctx.fillStyle = `rgb(${value},${value},${value})`;
+                    const grayValue = Math.random() * 255; // Renamed 'value' to 'grayValue' for clarity
+                    ctx.fillStyle = 'rgb(' + grayValue + ',' + grayValue + ',' + grayValue + ')';
                     ctx.fillRect(x, y, 1, 1);
                 }}
             }}