diff --git a/app.js b/app.js
index 8e91091..5156b0c 100644
--- a/app.js
+++ b/app.js
@@ -7,21 +7,20 @@ const url = require("url");
 const port = 8080;
 const host = "0.0.0.0";
 const mimeTypes = {
-  ".html": "text/html",
-  ".css": "text/css",
-  ".js": "application/javascript",
-  ".svg": "image/svg+xml",
-  ".png": "image/png",
-  ".jpg": "image/jpeg",
-  ".jpeg": "image/jpeg",
-  ".gif": "image/gif",
-  ".ico": "image/x-icon",
-  ".json": "application/json",
-  ".txt": "text/plain",
+    ".html": "text/html",
+    ".css": "text/css",
+    ".js": "application/javascript",
+    ".svg": "image/svg+xml",
+    ".png": "image/png",
+    ".jpg": "image/jpeg",
+    ".jpeg": "image/jpeg",
+    ".gif": "image/gif",
+    ".ico": "image/x-icon",
+    ".json": "application/json",
+    ".txt": "text/plain",
 };
 
-http
-  .createServer((req, res) => {
+http.createServer((req, res) => {
     // Parse the URL and extract just the pathname, ignoring query parameters
     const parsedUrl = url.parse(req.url);
     let filePath = "." + decodeURIComponent(parsedUrl.pathname);
@@ -31,15 +30,14 @@ http
     const contentType = mimeTypes[ext] || "application/octet-stream";
 
     fs.readFile(filePath, (err, content) => {
-      if (err) {
-        res.writeHead(404);
-        res.end("404 Not Found");
-      } else {
-        res.writeHead(200, { "Content-Type": contentType });
-        res.end(content);
-      }
+        if (err) {
+            res.writeHead(404);
+            res.end("404 Not Found");
+        } else {
+            res.writeHead(200, { "Content-Type": contentType });
+            res.end(content);
+        }
     });
-  })
-  .listen(port, host, () => {
+}).listen(port, host, () => {
     console.log(`Server running at http://${host}:${port}/`);
-  });
+});
diff --git a/index.html b/index.html
index cd6b48e..7655adb 100644
--- a/index.html
+++ b/index.html
@@ -22,88 +22,88 @@
  */
 -->
 <style>
-  body {
-    background: #444;
-    color: white;
-    font-family: monospace;
-  }
-  #gamepads > * {
-    background: #333;
-    padding: 1em;
-    margin: 10px 5px 0 0;
-  }
-  #gamepads pre {
-    white-space: pre-wrap;
-  }
+	body {
+		background: #444;
+		color: white;
+		font-family: monospace;
+	}
+	#gamepads > * {
+		background: #333;
+		padding: 1em;
+		margin: 10px 5px 0 0;
+	}
+	#gamepads pre {
+		white-space: pre-wrap;
+	}
 
-  .head {
-    display: flex;
-  }
-  .head .id {
-    flex: 1 1 auto;
-  }
-  .head .index,
-  .head .id {
-    display: inline-block;
-    background: #222;
-    padding: 0.5em;
-  }
-  .head .index {
-  }
+	.head {
+		display: flex;
+	}
+	.head .id {
+		flex: 1 1 auto;
+	}
+	.head .index,
+	.head .id {
+		display: inline-block;
+		background: #222;
+		padding: 0.5em;
+	}
+	.head .index {
+	}
 
-  .info .label {
-    width: 7em;
-    display: inline-block;
-  }
-  .info > div {
-    padding: 0.25em;
-    background: #222;
-    margin: 0.25em 0.25em 0 0;
-  }
+	.info .label {
+		width: 7em;
+		display: inline-block;
+	}
+	.info > div {
+		padding: 0.25em;
+		background: #222;
+		margin: 0.25em 0.25em 0 0;
+	}
 
-  .inputs {
-    display: flex;
-  }
-  .axes {
-    display: flex;
-    align-items: flex-start;
-  }
+	.inputs {
+		display: flex;
+	}
+	.axes {
+		display: flex;
+		align-items: flex-start;
+	}
 
-  .svg text {
-    color: #ccc;
-    font-family: monospace;
-  }
+	.svg text {
+		color: #ccc;
+		font-family: monospace;
+	}
 
-  .axes svg text {
-    font-size: 0.6px;
-  }
-  .buttons svg text {
-    font-size: 1.2px;
-  }
-  .axes > div,
-  .buttons > div {
-    display: inline-block;
-    background: #222;
-  }
-  .axes > div {
-    margin: 2px 5px 0 0;
-  }
-  .buttons > div {
-    margin: 2px 2px 0 0;
-  }
+	.axes svg text {
+		font-size: 0.6px;
+	}
+	.buttons svg text {
+		font-size: 1.2px;
+	}
+	.axes > div,
+	.buttons > div {
+		display: inline-block;
+		background: #222;
+	}
+	.axes > div {
+		margin: 2px 5px 0 0;
+	}
+	.buttons > div {
+		margin: 2px 2px 0 0;
+	}
 </style>
 <body>
-  <h1>HTML5 Gamepad Test</h1>
-  <div>running: <span id="running"></span></div>
-  <div id="gamepads"></div>
+	<h1>HTML5 Gamepad Test</h1>
+	<div>running: <span id="running"></span></div>
+	<div id="gamepads"></div>
 </body>
 <script>
-  const fudgeFactor = 2; // because of bug in Chrome related to svg text alignment font sizes can not be < 1
-  const runningElem = document.querySelector("#running");
-  const gamepadsElem = document.querySelector("#gamepads");
-  const gamepadsByIndex = {};
+	const fudgeFactor = 2; // because of bug in Chrome related to svg text alignment font sizes can not be < 1
+	const runningElem = document.querySelector("#running");
+	const gamepadsElem = document.querySelector("#gamepads");
+	const gamepadsByIndex = {};
 
-  const controllerTemplate = `
+	const controllerTemplate = `
 <div>
   <div class="head"><div class="index"></div><div class="id"></div></div>
   <div class="info"><div class="label">connected:</div><span class="connected"></span></div>
@@ -114,7 +114,7 @@
   </div>
 </div>
 `;
-  const axisTemplate = `
+	const axisTemplate = `
 <svg viewBox="-2.2 -2.2 4.4 4.4" width="128" height="128">
     <circle cx="0" cy="0" r="2" fill="none" stroke="#888" stroke-width="0.04" />
     <path d="M0,-2L0,2M-2,0L2,0" stroke="#888" stroke-width="0.04" />
@@ -123,7 +123,7 @@
 </svg>
 `;
 
-  const buttonTemplate = `
+	const buttonTemplate = `
 <svg viewBox="-2.2 -2.2 4.4 4.4" width="64" height="64">
   <circle cx="0" cy="0" r="2" fill="none" stroke="#888" stroke-width="0.1" />
   <circle cx="0" cy="0" r="0" fill="none" fill="red" class="button" />
@@ -132,133 +132,141 @@
 </svg>
 `;
 
-  function addGamepad(gamepad) {
-    console.log("add:", gamepad.index);
-    const elem = document.createElement("div");
-    elem.innerHTML = controllerTemplate;
+	function addGamepad(gamepad) {
+		console.log("add:", gamepad.index);
+		const elem = document.createElement("div");
+		elem.innerHTML = controllerTemplate;
 
-    const axesElem = elem.querySelector(".axes");
-    const buttonsElem = elem.querySelector(".buttons");
+		const axesElem = elem.querySelector(".axes");
+		const buttonsElem = elem.querySelector(".buttons");
 
-    const axes = [];
-    for (let ndx = 0; ndx < gamepad.axes.length; ndx += 2) {
-      const div = document.createElement("div");
-      div.innerHTML = axisTemplate;
-      axesElem.appendChild(div);
-      axes.push({
-        axis: div.querySelector(".axis"),
-        value: div.querySelector("text"),
-      });
-    }
+		const axes = [];
+		for (let ndx = 0; ndx < gamepad.axes.length; ndx += 2) {
+			const div = document.createElement("div");
+			div.innerHTML = axisTemplate;
+			axesElem.appendChild(div);
+			axes.push({
+				axis: div.querySelector(".axis"),
+				value: div.querySelector("text"),
+			});
+		}
 
-    const buttons = [];
-    for (let ndx = 0; ndx < gamepad.buttons.length; ++ndx) {
-      const div = document.createElement("div");
-      div.innerHTML = buttonTemplate;
-      buttonsElem.appendChild(div);
-      div.querySelector(".index").textContent = ndx;
-      buttons.push({
-        circle: div.querySelector(".button"),
-        value: div.querySelector(".value"),
-      });
-    }
+		const buttons = [];
+		for (let ndx = 0; ndx < gamepad.buttons.length; ++ndx) {
+			const div = document.createElement("div");
+			div.innerHTML = buttonTemplate;
+			buttonsElem.appendChild(div);
+			div.querySelector(".index").textContent = ndx;
+			buttons.push({
+				circle: div.querySelector(".button"),
+				value: div.querySelector(".value"),
+			});
+		}
 
-    gamepadsByIndex[gamepad.index] = {
-      gamepad,
-      elem,
-      axes,
-      buttons,
-      index: elem.querySelector(".index"),
-      id: elem.querySelector(".id"),
-      mapping: elem.querySelector(".mapping"),
-      connected: elem.querySelector(".connected"),
-    };
-    gamepadsElem.appendChild(elem);
-  }
+		gamepadsByIndex[gamepad.index] = {
+			gamepad,
+			elem,
+			axes,
+			buttons,
+			index: elem.querySelector(".index"),
+			id: elem.querySelector(".id"),
+			mapping: elem.querySelector(".mapping"),
+			connected: elem.querySelector(".connected"),
+		};
+		gamepadsElem.appendChild(elem);
+	}
 
-  function removeGamepad(gamepad) {
-    const info = gamepadsByIndex[gamepad.index];
-    if (info) {
-      delete gamepadsByIndex[gamepad.index];
-      info.elem.parentElement.removeChild(info.elem);
-    }
-  }
+	function removeGamepad(gamepad) {
+		const info = gamepadsByIndex[gamepad.index];
+		if (info) {
+			delete gamepadsByIndex[gamepad.index];
+			info.elem.parentElement.removeChild(info.elem);
+		}
+	}
 
-  function addGamepadIfNew(gamepad) {
-    const info = gamepadsByIndex[gamepad.index];
-    if (!info) {
-      addGamepad(gamepad);
-    } else {
-      // This broke sometime in the past. It used to be
-      // the same gamepad object was returned forever.
-      // Then Chrome only changed to a new gamepad object
-      // is returned every frame.
-      info.gamepad = gamepad;
-    }
-  }
+	function addGamepadIfNew(gamepad) {
+		const info = gamepadsByIndex[gamepad.index];
+		if (!info) {
+			addGamepad(gamepad);
+		} else {
+			// This broke sometime in the past. It used to be
+			// the same gamepad object was returned forever.
+			// Then Chrome only changed to a new gamepad object
+			// is returned every frame.
+			info.gamepad = gamepad;
+		}
+	}
 
-  function handleConnect(e) {
-    console.log("connect");
-    addGamepadIfNew(e.gamepad);
-  }
+	function handleConnect(e) {
+		console.log("connect");
+		addGamepadIfNew(e.gamepad);
+	}
 
-  function handleDisconnect(e) {
-    console.log("disconnect");
-    removeGamepad(e.gamepad);
-  }
+	function handleDisconnect(e) {
+		console.log("disconnect");
+		removeGamepad(e.gamepad);
+	}
 
-  const t = String.fromCharCode(0x26aa);
-  const f = String.fromCharCode(0x26ab);
-  function onOff(v) {
-    return v ? t : f;
-  }
+	const t = String.fromCharCode(0x26aa);
+	const f = String.fromCharCode(0x26ab);
+	function onOff(v) {
+		return v ? t : f;
+	}
 
-  const keys = ["index", "id", "connected", "mapping" /*'timestamp'*/];
-  function processController(info) {
-    const { elem, gamepad, axes, buttons } = info;
-    const lines = [`gamepad  : ${gamepad.index}`];
-    for (const key of keys) {
-      info[key].textContent = gamepad[key];
-    }
-    axes.forEach(({ axis, value }, ndx) => {
-      const off = ndx * 2;
-      axis.setAttributeNS(null, "cx", gamepad.axes[off] * fudgeFactor);
-      axis.setAttributeNS(null, "cy", gamepad.axes[off + 1] * fudgeFactor);
-      value.textContent = `${gamepad.axes[off].toFixed(2).padStart(5)},${gamepad.axes[off + 1].toFixed(2).padStart(5)}`;
-    });
-    buttons.forEach(({ circle, value }, ndx) => {
-      const button = gamepad.buttons[ndx];
-      circle.setAttributeNS(null, "r", button.value * fudgeFactor);
-      circle.setAttributeNS(null, "fill", button.pressed ? "red" : "gray");
-      value.textContent = `${button.value.toFixed(2)}`;
-    });
+	const keys = ["index", "id", "connected", "mapping" /*'timestamp'*/];
+	function processController(info) {
+		const { elem, gamepad, axes, buttons } = info;
+		const lines = [`gamepad  : ${gamepad.index}`];
+		for (const key of keys) {
+			info[key].textContent = gamepad[key];
+		}
+		axes.forEach(({ axis, value }, ndx) => {
+			const off = ndx * 2;
+			axis.setAttributeNS(null, "cx", gamepad.axes[off] * fudgeFactor);
+			axis.setAttributeNS(
+				null,
+				"cy",
+				gamepad.axes[off + 1] * fudgeFactor,
+			);
+			value.textContent = `${gamepad.axes[off].toFixed(2).padStart(5)},${gamepad.axes[off + 1].toFixed(2).padStart(5)}`;
+		});
+		buttons.forEach(({ circle, value }, ndx) => {
+			const button = gamepad.buttons[ndx];
+			circle.setAttributeNS(null, "r", button.value * fudgeFactor);
+			circle.setAttributeNS(
+				null,
+				"fill",
+				button.pressed ? "red" : "gray",
+			);
+			value.textContent = `${button.value.toFixed(2)}`;
+		});
 
-    //  lines.push(`axes     : [${gamepad.axes.map((v, ndx) => `${ndx}: ${v.toFixed(2).padStart(5)}`).join(', ')} ]`);
-    //  lines.push(`buttons  : [${gamepad.buttons.map((v, ndx) => `${ndx}: ${onOff(v.pressed)} ${v.value.toFixed(2)}`).join(', ')} ]`);
-    // elem.textContent = lines.join('\n');
-  }
+		//  lines.push(`axes     : [${gamepad.axes.map((v, ndx) => `${ndx}: ${v.toFixed(2).padStart(5)}`).join(', ')} ]`);
+		//  lines.push(`buttons  : [${gamepad.buttons.map((v, ndx) => `${ndx}: ${onOff(v.pressed)} ${v.value.toFixed(2)}`).join(', ')} ]`);
+		// elem.textContent = lines.join('\n');
+	}
 
-  function addNewPads() {
-    const gamepads = navigator.getGamepads();
-    for (let i = 0; i < gamepads.length; i++) {
-      const gamepad = gamepads[i];
-      if (gamepad) {
-        addGamepadIfNew(gamepad);
-      }
-    }
-  }
+	function addNewPads() {
+		const gamepads = navigator.getGamepads();
+		for (let i = 0; i < gamepads.length; i++) {
+			const gamepad = gamepads[i];
+			if (gamepad) {
+				addGamepadIfNew(gamepad);
+			}
+		}
+	}
 
-  window.addEventListener("gamepadconnected", handleConnect);
-  window.addEventListener("gamepaddisconnected", handleDisconnect);
+	window.addEventListener("gamepadconnected", handleConnect);
+	window.addEventListener("gamepaddisconnected", handleDisconnect);
 
-  function process() {
-    runningElem.textContent = (((performance.now() * 0.001 * 60) | 0) % 100)
-      .toString()
-      .padStart(2, "0");
-    addNewPads(); // some browsers add by polling, others by event
+	function process() {
+		runningElem.textContent = (((performance.now() * 0.001 * 60) | 0) % 100)
+			.toString()
+			.padStart(2, "0");
+		addNewPads(); // some browsers add by polling, others by event
 
-    Object.values(gamepadsByIndex).forEach(processController);
-    requestAnimationFrame(process);
-  }
-  requestAnimationFrame(process);
+		Object.values(gamepadsByIndex).forEach(processController);
+		requestAnimationFrame(process);
+	}
+	requestAnimationFrame(process);
 </script>
