diff --git a/.github/workflows/test.yml-template b/.github/workflows/test.yml-template
new file mode 100644
index 00000000..bb13dfc4
--- /dev/null
+++ b/.github/workflows/test.yml-template
@@ -0,0 +1,23 @@
+name: Test
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [20.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm test
diff --git a/package-lock.json b/package-lock.json
index 185b2268..631641b2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "license": "GPL-3.0",
       "devDependencies": {
         "@mate-academy/eslint-config": "latest",
-        "@mate-academy/scripts": "^1.8.6",
+        "@mate-academy/scripts": "^1.9.12",
         "eslint": "^8.57.0",
         "eslint-plugin-jest": "^28.6.0",
         "eslint-plugin-node": "^11.1.0",
@@ -1467,10 +1467,11 @@
       }
     },
     "node_modules/@mate-academy/scripts": {
-      "version": "1.8.6",
-      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.8.6.tgz",
-      "integrity": "sha512-b4om/whj4G9emyi84ORE3FRZzCRwRIesr8tJHXa8EvJdOaAPDpzcJ8A0sFfMsWH9NUOVmOwkBtOXDu5eZZ00Ig==",
+      "version": "1.9.12",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-1.9.12.tgz",
+      "integrity": "sha512-/OcmxMa34lYLFlGx7Ig926W1U1qjrnXbjFJ2TzUcDaLmED+A5se652NcWwGOidXRuMAOYLPU2jNYBEkKyXrFJA==",
       "dev": true,
+      "license": "MIT",
       "dependencies": {
         "@octokit/rest": "^17.11.2",
         "@types/get-port": "^4.2.0",
diff --git a/package.json b/package.json
index 216da526..5847534c 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "latest",
-    "@mate-academy/scripts": "^1.8.6",
+    "@mate-academy/scripts": "^1.9.12",
     "eslint": "^8.57.0",
     "eslint-plugin-jest": "^28.6.0",
     "eslint-plugin-node": "^11.1.0",
diff --git a/src/app.js b/src/app.js
index e89a2d97..9b7c71dc 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1,3 +1,41 @@
 'use strict';
 
-// Write your code here
+const readline = require('node:readline');
+const { checkIsValidUserInput } = require('./modules/checkIsValidUserInput.js');
+const { generateRandomNumber } = require('./modules/generateRandomNumber.js');
+const { getBullsAndCows } = require('./modules/getBullsAndCows.js');
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+});
+
+const print = (message) => rl.write(message + '\n');
+
+const secretNumber = generateRandomNumber();
+
+// Функція, яка запускає одну спробу гри
+function playRound() {
+  rl.question('Введіть ваше число: ', (guess) => {
+    const validInput = checkIsValidUserInput(guess);
+
+    if (!checkIsValidUserInput(guess)) {
+      print('невалідне значення');
+      playRound();
+    }
+
+    if (validInput && guess !== secretNumber.toString()) {
+      const { bulls, cows } = getBullsAndCows(guess, secretNumber);
+
+      print(`Бики: ${bulls}, Корови: ${cows}`);
+      playRound(); // Запускаємо ще один раунд
+    }
+
+    if (guess === secretNumber.toString() && validInput) {
+      print(`Вітаємо! Ви вгадали число ${secretNumber}!`);
+      rl.close();
+    }
+  });
+}
+
+playRound();
diff --git a/src/modules/checkIsValidUserInput.js b/src/modules/checkIsValidUserInput.js
index 40979664..f60f837a 100644
--- a/src/modules/checkIsValidUserInput.js
+++ b/src/modules/checkIsValidUserInput.js
@@ -9,7 +9,20 @@
  * @return {boolean} - True if the user input is valid, false otherwise
  */
 function checkIsValidUserInput(userInput) {
-  /* Write your code here */
+  // Перевірка, що це 4-значне число
+  if (userInput.length !== 4 || isNaN(+userInput)) {
+    return false;
+  }
+
+  // Перевірка, що число не починається з 0
+  if (userInput[0] === '0') {
+    return false;
+  }
+
+  // Перевірка на дублікати за допомогою Set
+  const uniqueDigits = new Set(userInput.split(''));
+
+  return uniqueDigits.size === 4;
 }
 
 module.exports = {
diff --git a/src/modules/generateRandomNumber.js b/src/modules/generateRandomNumber.js
index 14ad1e2b..67b71aaa 100644
--- a/src/modules/generateRandomNumber.js
+++ b/src/modules/generateRandomNumber.js
@@ -7,7 +7,20 @@
  * @return {number} A random 4-digit number
  */
 function generateRandomNumber() {
-  /* Write your code here */
+  const digits = [];
+
+  while (digits.length < 4) {
+    const digit = Math.floor(Math.random() * 10).toString();
+
+    // Перевіряємо, що перша цифра не є 0 та цифра ще не додана
+    if ((digits.length === 0 && digit === '0') || digits.includes(digit)) {
+      continue;
+    }
+
+    digits.push(digit);
+  }
+
+  return parseInt(digits.join(''), 10);
 }
 
 module.exports = {
diff --git a/src/modules/getBullsAndCows.js b/src/modules/getBullsAndCows.js
index 3f0b39a6..a911e977 100644
--- a/src/modules/getBullsAndCows.js
+++ b/src/modules/getBullsAndCows.js
@@ -13,7 +13,35 @@
  * Example: { bulls: 1, cows: 2 }
  */
 function getBullsAndCows(userInput, numberToGuess) {
-  /* Write your code here */
+  const userInputStr = userInput.toString();
+  const numberToGuessStr = numberToGuess.toString();
+
+  const result = {
+    bulls: 0,
+    cows: 0,
+  };
+
+  const checkedPositions = new Array(4).fill(false);
+
+  for (let i = 0; i < 4; i++) {
+    if (userInputStr[i] === numberToGuessStr[i]) {
+      result.bulls++;
+      checkedPositions[i] = true;
+    }
+  }
+
+  for (let i = 0; i < 4; i++) {
+    if (userInputStr[i] !== numberToGuessStr[i]) {
+      const cowIndex = numberToGuessStr.indexOf(userInputStr[i]);
+
+      if (cowIndex !== -1 && !checkedPositions[cowIndex]) {
+        result.cows++;
+        checkedPositions[cowIndex] = true;
+      }
+    }
+  }
+
+  return result;
 }
 
 module.exports = {