,

, etc.\n\nIn the CSS, the pie chart will be a div with a border-radius of 50% and a conic gradient. The gradient stops will be calculated based on the cumulative counts of each digit. For example, if digit 0 has 5% occurrence, its slice takes 5% of the circle, then digit 1 takes its percentage starting from 5%, and so on.\n\nJavaScript part: Need to keep track of counts for each digit. Initialize an array of 10 elements, all starting at 0. As each digit is generated, increment the corresponding index. Then, recalculate the conic gradient each time.\n\nGenerating Pi digits: This is the tricky part. Implementing a Spigot algorithm in JavaScript. Let me recall how that works. The Spigot algorithm yields digits one by one without needing to store all previous digits. I'll need to find a correct implementation. Alternatively, use a precomputed array of digits for demonstration, but the user wants real-time calculation. So, must implement the algorithm.\n\nWait, maybe there's a simpler way. Let me think. There's a JavaScript implementation of the Spigot algorithm available online. Let me see. For example, this code:\n\nfunction* generateDigitsOfPi() {\n let q = 1n, r = 180n, t = 60n, i = 2n;\n for (;;) {\n let digit = ((i * 27n - 12n) * q + r * 5n) / (t * 5n);\n yield Number(digit);\n let u = i * 3n;\n u = (u + 1n) * 3n * (u + 2n);\n r = u * 10n * (q * (i * 5n - 2n) + r - t * digit);\n q *= 10n * i * (i++ * 2n - 1n);\n t *= u;\n }\n}\n\nThis generator function yields Pi digits one by one. But using BigInt might be compatible with modern browsers. So, using this, we can create an async loop that yields each digit, updates the counts, and then updates the pie chart with a small delay.\n\nPutting it all together:\n\n1. HTML structure with the chart container, buttons, and status.\n2. CSS for the pie chart, responsive design, and colors.\n3. JavaScript to handle the Pi digit generation, update the counts, redraw the chart, and control the animation loop.\n\nTesting for performance: Since updating the conic gradient on every digit might be resource-intensive if done too frequently, adding a small delay (like 50ms) between updates would help smooth the animation and prevent browser lag.\n\nAccessibility: Adding aria-live regions for the status updates so screen readers can announce changes. Also, ensuring color contrast for the digits.\n\nEdge cases: Handling the initial state where all counts are zero. Maybe starting the chart with all slices at 0% but with their respective colors. Alternatively, initializing each digit to 1 to avoid division by zero in percentage calculations.\n\nError handling: The Pi digit generator might have issues, so try/catch around that part, but since it's a known algorithm, it should be reliable.\n\nNow, let's outline the code.\n\nFor the domain: Something related to Pi and charts. Maybe \"pichart.scroll.pub\" or \"pidigits.scroll.pub\". Let's go with \"pidist.scroll.pub\" (Pi Distribution).\n\nIn the HTML (using Scroll syntax):\n\nThe body would have a main container with a div for the pie chart, a div for controls (buttons), and a status div. The buttons have IDs for JavaScript to hook into.\n\nIn CSS, define the .pie-chart with a conic-gradient, transitions for smooth updates. Assign colors using nth-child or data attributes for each digit's percentage.\n\nIn JavaScript, create the Pi digit generator, track counts, update the conic gradient, and handle the animation loop with setTimeout or requestAnimationFrame.\n\nTesting the code step by step: Ensure that the generator produces correct digits, the counts update, the gradient is calculated correctly, and the animation runs smoothly. Also, test the pause/start functionality.\n\nPotential issues: Conic gradients might not be supported in older browsers, but the user specified modern practices, so it's acceptable. Fallbacks could be considered but not required here.\n\nColors: Using HSL, with hue ranging from 0 to 360 in steps of 36 (360/10) for each digit. That gives each digit a distinct color.\n\nNow, putting it all into the required format."