diff --git a/Chapter02/communicating-with-sockets/client.js b/Chapter02/communicating-with-sockets/client.js
index d712e99..eda6175 100644
--- a/Chapter02/communicating-with-sockets/client.js
+++ b/Chapter02/communicating-with-sockets/client.js
@@ -1,12 +1,12 @@
-const net = require('net');
+const net = require('net')
 
-const HOSTNAME = 'localhost';
-const PORT = 3000;
+const HOSTNAME = 'localhost'
+const PORT = 3000
 
-const socket = net.connect(PORT, HOSTNAME);
+const socket = net.connect(PORT, HOSTNAME)
 
-socket.write('World');
+socket.write('World')
 
 socket.on('data', (data) => {
-    console.log(data.toString());
-});
+  console.log(data.toString())
+})
diff --git a/Chapter02/communicating-with-sockets/server.js b/Chapter02/communicating-with-sockets/server.js
index ddf6495..964af36 100644
--- a/Chapter02/communicating-with-sockets/server.js
+++ b/Chapter02/communicating-with-sockets/server.js
@@ -1,13 +1,12 @@
-const net = require('net');
+const net = require('net')
 
-const HOSTNAME = 'localhost';
-const PORT = 3000;
+const HOSTNAME = 'localhost'
+const PORT = 3000
 
 net.createServer((socket) => {
-    console.log('Client connected.');
+  console.log('Client connected.')
 
-    socket.on('data', name => {
-        socket.write(`Hello ${name}!`);
-    });
-
-}).listen(PORT, HOSTNAME);
\ No newline at end of file
+  socket.on('data', name => {
+    socket.write(`Hello ${name}!`)
+  })
+}).listen(PORT, HOSTNAME)
diff --git a/Chapter02/fetching-metadata/chmod-octal.js b/Chapter02/fetching-metadata/chmod-octal.js
index 3d5e1df..2c509c3 100644
--- a/Chapter02/fetching-metadata/chmod-octal.js
+++ b/Chapter02/fetching-metadata/chmod-octal.js
@@ -1,6 +1,4 @@
-'use strict'
+const fs = require('fs')
+const file = './file.txt'
 
-const fs = require('fs');
-const file = './file.txt';
-
-fs.chmodSync("./file.txt", 0o664);
\ No newline at end of file
+fs.chmodSync(file, 0o664)
diff --git a/Chapter02/fetching-metadata/chmod.js b/Chapter02/fetching-metadata/chmod.js
index 7da6a40..af9c18b 100644
--- a/Chapter02/fetching-metadata/chmod.js
+++ b/Chapter02/fetching-metadata/chmod.js
@@ -1,9 +1,7 @@
-'use strict'
+const fs = require('fs')
+const file = './file.txt'
 
-const fs = require('fs');
-const file = './file.txt';
-
-fs.chmodSync("./file.txt",
-    fs.constants.S_IRUSR | fs.constants.S_IWUSR |
-    fs.constants.S_IRGRP | fs.constants.S_IWGRP |
-    fs.constants.S_IROTH);
\ No newline at end of file
+fs.chmodSync(file,
+  fs.constants.S_IRUSR | fs.constants.S_IWUSR |
+  fs.constants.S_IRGRP | fs.constants.S_IWGRP |
+  fs.constants.S_IROTH)
\ No newline at end of file
diff --git a/Chapter02/fetching-metadata/metadata.js b/Chapter02/fetching-metadata/metadata.js
index d762341..e8ecc2a 100644
--- a/Chapter02/fetching-metadata/metadata.js
+++ b/Chapter02/fetching-metadata/metadata.js
@@ -1,9 +1,9 @@
-const fs = require('fs');
-const file = process.argv[2];
+const fs = require('fs')
+const file = process.argv[2]
 
-function printMetadata(file) {
-    const fileStats = fs.statSync(file);
-    console.log(fileStats);
-};
+function printMetadata (file) {
+  const fileStats = fs.statSync(file)
+  console.log(fileStats)
+}
 
-printMetadata(file);
\ No newline at end of file
+printMetadata(file)
diff --git a/Chapter02/fetching-metadata/metadata2.js b/Chapter02/fetching-metadata/metadata2.js
index ed1011e..3e5f321 100644
--- a/Chapter02/fetching-metadata/metadata2.js
+++ b/Chapter02/fetching-metadata/metadata2.js
@@ -1,13 +1,13 @@
-const fs = require('fs');
-const file = process.argv[2];
+const fs = require('fs')
+const file = process.argv[2]
 
-function printMetadata(file) {
-    try {
-        const fileStats = fs.statSync(file);
-        console.log(fileStats);
-    } catch (err) {
-        console.error("Error reading file path:", file);
-    }
-};
+function printMetadata (file) {
+  try {
+    const fileStats = fs.statSync(file)
+    console.log(fileStats)
+  } catch (err) {
+    console.error('Error reading file path:', file)
+  }
+}
 
-printMetadata(file);
\ No newline at end of file
+printMetadata(file)
diff --git a/Chapter02/file-watching/watch.js b/Chapter02/file-watching/watch.js
index cea0862..12d552b 100644
--- a/Chapter02/file-watching/watch.js
+++ b/Chapter02/file-watching/watch.js
@@ -1,6 +1,6 @@
-const fs = require('fs');
-const file = './file.txt';
+const fs = require('fs')
+const file = './file.txt'
 
 fs.watchFile(file, (current, previous) => {
-    return console.log(`${file} updated ${time}`)
-});
\ No newline at end of file
+  return console.log(`${file} updated ${time}`)
+})
diff --git a/Chapter02/file-watching/watch2.js b/Chapter02/file-watching/watch2.js
index b756a34..28884ec 100644
--- a/Chapter02/file-watching/watch2.js
+++ b/Chapter02/file-watching/watch2.js
@@ -1,8 +1,8 @@
-const fs = require('fs');
-const file = './file.txt';
-const moment = require('moment');
+const fs = require('fs')
+const file = './file.txt'
+const moment = require('moment')
 
 fs.watch(file, (eventType, filename) => {
-    const time = moment().format('MMMM Do YYYY, h:mm:ss a');
-    return console.log(`${filename} updated ${time}`)
-});
\ No newline at end of file
+  const time = moment().format('MMMM Do YYYY, h:mm:ss a')
+  return console.log(`${filename} updated ${time}`)
+})
diff --git a/Chapter02/interfacing-with-io/greeting.js b/Chapter02/interfacing-with-io/greeting.js
index 8082c47..d7efb55 100644
--- a/Chapter02/interfacing-with-io/greeting.js
+++ b/Chapter02/interfacing-with-io/greeting.js
@@ -1,4 +1,4 @@
-process.stdin.on('data', (data) => {
-    let name = data.toString().trim().toUpperCase();
-    process.stdout.write(`Hello ${name}!`);   
-});
\ No newline at end of file
+process.stdin.on('data', data => {
+  const name = data.toString().trim().toUpperCase()
+  process.stdout.write(`Hello ${name}!`)
+})
\ No newline at end of file
diff --git a/Chapter02/interfacing-with-io/greeting2.js b/Chapter02/interfacing-with-io/greeting2.js
index e4d20ed..09077a7 100644
--- a/Chapter02/interfacing-with-io/greeting2.js
+++ b/Chapter02/interfacing-with-io/greeting2.js
@@ -1,8 +1,8 @@
 process.stdin.on('data', data => {
-    let name = data.toString().trim().toUpperCase();
-    if (name != '') {
-        process.stdout.write(`Hello ${name}!`);
-    } else {
-        process.stderr.write('Input was empty.');
-    }
-});
\ No newline at end of file
+  const name = data.toString().trim().toUpperCase()
+  if (name !== '') {
+    process.stdout.write(`Hello ${name}!`)
+  } else {
+    process.stderr.write('Input was empty.')
+  }
+})
\ No newline at end of file
diff --git a/Chapter02/working-with-files/callback-hell.js b/Chapter02/working-with-files/callback-hell.js
index 04cbf4d..cbee88b 100644
--- a/Chapter02/working-with-files/callback-hell.js
+++ b/Chapter02/working-with-files/callback-hell.js
@@ -1,5 +1,5 @@
 first(args, function () {
-    second(args, function () {
-        third(args, function () {})
-    })
-})
\ No newline at end of file
+  second(args, function () {
+    third(args, function () {})
+  })
+})
diff --git a/Chapter02/working-with-files/readWriteAsync.js b/Chapter02/working-with-files/readWriteAsync.js
index 44bc0a9..8ced789 100644
--- a/Chapter02/working-with-files/readWriteAsync.js
+++ b/Chapter02/working-with-files/readWriteAsync.js
@@ -1,16 +1,16 @@
-const fs = require('fs');
+const fs = require('fs')
 const path = require('path')
 
-const filepath = path.join(process.cwd(), 'hello.txt');
+const filepath = path.join(process.cwd(), 'hello.txt')
 
 fs.readFile(filepath, 'utf8', function (err, contents) {
-    if (err) {
-        return console.log(err);
-    }
-    console.log("File Contents:", contents);
-    contents = contents.toUpperCase();
-    fs.writeFile(filepath, contents, function (err) {
-        if (err) throw err;
-        console.log("File updated.")
-    });
-});
+  if (err) {
+    return console.log(err)
+  }
+  console.log('File Contents:', contents)
+  const upperContents = contents.toUpperCase()
+  fs.writeFile(filepath, upperContents, function (err) {
+    if (err) throw err
+    console.log('File updated.')
+  })
+})
\ No newline at end of file
diff --git a/Chapter02/working-with-files/readWriteAsync2.js b/Chapter02/working-with-files/readWriteAsync2.js
index e45a9fb..a13a8dd 100644
--- a/Chapter02/working-with-files/readWriteAsync2.js
+++ b/Chapter02/working-with-files/readWriteAsync2.js
@@ -1,20 +1,22 @@
-const fs = require('fs');
+const fs = require('fs')
 const path = require('path')
 
-const filepath = path.join(process.cwd(), 'hello.txt');
+const filepath = path.join(process.cwd(), 'hello.txt')
 
 fs.readFile(filepath, 'utf8', function (err, contents) {
-    if (err) {
-        return console.log(err);
-    }
-    console.log("File Contents:", contents);
-    contents = contents.toUpperCase();
-    updateFile(filepath, contents);
-});
+  if (err) {
+    return console.log(err)
+  }
+  console.log('File Contents:', contents)
+  const upperContents = contents.toUpperCase()
+  setTimeout(() => updateFile(filepath, upperContents), 10)
+})
 
 function updateFile(filepath, contents) {
-    fs.writeFile(filepath, contents, function (err) {
-        if (err) throw err;
-        console.log("File updated.");
-    });
-};
\ No newline at end of file
+  fs.writeFile(filepath, contents, function (err) {
+    if (err) throw err
+    console.log('File updated.')
+  })
+}
+
+setInterval(() => process.stdout.write('**** \n'), 1).unref()
\ No newline at end of file
diff --git a/Chapter02/working-with-files/readWritePromise.js b/Chapter02/working-with-files/readWritePromise.js
index ecc474d..d31c147 100644
--- a/Chapter02/working-with-files/readWritePromise.js
+++ b/Chapter02/working-with-files/readWritePromise.js
@@ -1,15 +1,15 @@
-const fs = require("fs").promises;
-const path = require('path');
+const fs = require('fs').promises
+const path = require('path')
 
-const filepath = path.join(process.cwd(), 'hello.txt');
+const filepath = path.join(process.cwd(), 'hello.txt')
 
-async function run() {
-    try {
-        const contents = await fs.readFile(filepath, 'utf8');
-        console.log("File Contents:", contents);
-    } catch (error) {
-        console.error(error);
-    }
-};
+async function run () {
+  try {
+    const contents = await fs.readFile(filepath, 'utf8')
+    console.log('File Contents:', contents)
+  } catch (error) {
+    console.error(error)
+  }
+}
 
-run();
\ No newline at end of file
+run()
diff --git a/Chapter02/working-with-files/readWriteSync.js b/Chapter02/working-with-files/readWriteSync.js
index 2f1ebd9..0b60662 100644
--- a/Chapter02/working-with-files/readWriteSync.js
+++ b/Chapter02/working-with-files/readWriteSync.js
@@ -1,12 +1,11 @@
-const fs = require('fs');
-const path = require('path');
+const fs = require('fs')
+const path = require('path')
 
-const filepath = path.join(process.cwd(), 'hello.txt');
+const filepath = path.join(process.cwd(), 'hello.txt')
 
-let contents = fs.readFileSync(filepath, 'utf8');
-console.log("File Contents:", contents);
+const contents = fs.readFileSync(filepath, 'utf8')
+console.log('File Contents:', contents)
 
-contents = contents.toString().toUpperCase();
-
-fs.writeFileSync(filepath, contents);
-console.log("File updated.");
+const upperContents = contents.toUpperCase()
+fs.writeFileSync(filepath, upperContents)
+console.log('File updated.')