diff --git a/package-lock.json b/package-lock.json
index a89028b4..84111a72 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -463,12 +463,13 @@
       }
     },
     "@mate-academy/scripts": {
-      "version": "0.3.5",
-      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-0.3.5.tgz",
-      "integrity": "sha512-tzMDMsCdgKllLyvs0eW5/NXzW99cSBQYq1mOVmN7BWIUc/n7kx6HkAvaO9KMUSkXnVIGtIcuTr51U71juoD/Sg==",
+      "version": "0.3.29",
+      "resolved": "https://registry.npmjs.org/@mate-academy/scripts/-/scripts-0.3.29.tgz",
+      "integrity": "sha512-aFsO10h1KFLBidaiPXtMtRnRI0kL/0Sg8M+wMzncbtnTDPHbisu5ZRhCVQwpdRRbsqXPAlO5LJNp5YrdKs3dCw==",
       "dev": true,
       "requires": {
         "commander": "^5.1.0",
+        "cross-env": "^7.0.2",
         "fs-extra": "^9.0.0"
       }
     },
@@ -1285,6 +1286,58 @@
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac=",
       "dev": true
     },
+    "cross-env": {
+      "version": "7.0.3",
+      "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-7.0.3.tgz",
+      "integrity": "sha512-+/HKd6EgcQCJGh2PSjZuUitQBQynKor4wrFbRg4DtAgS1aWO+gU52xpH7M9ScGgXSYmAVS9bIJ8EzuaGw0oNAw==",
+      "dev": true,
+      "requires": {
+        "cross-spawn": "^7.0.1"
+      },
+      "dependencies": {
+        "cross-spawn": {
+          "version": "7.0.3",
+          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
+          "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+          "dev": true,
+          "requires": {
+            "path-key": "^3.1.0",
+            "shebang-command": "^2.0.0",
+            "which": "^2.0.1"
+          }
+        },
+        "path-key": {
+          "version": "3.1.1",
+          "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
+          "integrity": "sha512-ojmeN0qd+y0jszEtoY48r0Peq5dwMEkIlCOu6Q5f41lfkswXuKtYrhgoTpLnyIcHm24Uhqx+5Tqm2InSwLhE6Q==",
+          "dev": true
+        },
+        "shebang-command": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-2.0.0.tgz",
+          "integrity": "sha512-kHxr2zZpYtdmrN1qDjrrX/Z1rR1kG8Dx+gkpK1G4eXmvXswmcE1hTWBWYUzlraYw1/yZp6YuDY77YtvbN0dmDA==",
+          "dev": true,
+          "requires": {
+            "shebang-regex": "^3.0.0"
+          }
+        },
+        "shebang-regex": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-3.0.0.tgz",
+          "integrity": "sha512-7++dFhtcx3353uBaq8DDR4NuxBetBzC7ZQOhmTQInHEd6bSrXdiEyzCvG07Z44UYdLShWUyXt5M/yhz8ekcb1A==",
+          "dev": true
+        },
+        "which": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+          "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
+          "dev": true,
+          "requires": {
+            "isexe": "^2.0.0"
+          }
+        }
+      }
+    },
     "cross-spawn": {
       "version": "6.0.5",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
@@ -2206,15 +2259,15 @@
       }
     },
     "fs-extra": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-9.0.0.tgz",
-      "integrity": "sha512-pmEYSk3vYsG/bF651KPUXZ+hvjpgWYw/Gc7W9NFUe3ZVLczKKWIij3IKpOrQcdw4TILtibFslZ0UmR8Vvzig4g==",
+      "version": "9.1.0",
+      "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-9.1.0.tgz",
+      "integrity": "sha512-hcg3ZmepS30/7BSFqRvoo3DOMQu7IjqxO5nCDt+zM9XWjb33Wg7ziNT+Qvqbuc3+gWpzO02JubVyk2G4Zvo1OQ==",
       "dev": true,
       "requires": {
         "at-least-node": "^1.0.0",
         "graceful-fs": "^4.2.0",
         "jsonfile": "^6.0.1",
-        "universalify": "^1.0.0"
+        "universalify": "^2.0.0"
       }
     },
     "fs.realpath": {
@@ -3409,13 +3462,13 @@
       }
     },
     "jsonfile": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.0.1.tgz",
-      "integrity": "sha512-jR2b5v7d2vIOust+w3wtFKZIfpC2pnRmFAhAC/BuweZFQR8qZzxH1OyrQ10HmdVYiXWkYUqPVsz91cG7EL2FBg==",
+      "version": "6.1.0",
+      "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-6.1.0.tgz",
+      "integrity": "sha512-5dgndWOriYSm5cnYaJNhalLNDKOqFwyDB/rr1E9ZsGciGvKPs8R2xYGCacuf3z6K1YKDz182fd+fY3cn3pMqXQ==",
       "dev": true,
       "requires": {
         "graceful-fs": "^4.1.6",
-        "universalify": "^1.0.0"
+        "universalify": "^2.0.0"
       }
     },
     "jsprim": {
@@ -5131,9 +5184,9 @@
       }
     },
     "universalify": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/universalify/-/universalify-1.0.0.tgz",
-      "integrity": "sha512-rb6X1W158d7pRQBg5gkR8uPaSfiids68LTJQYOtEUhoJUWBdaQHsuT/EUduxXYxcrt4r5PJ4fuHW1MHT6p0qug==",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-2.0.0.tgz",
+      "integrity": "sha512-hAZsKq7Yy11Zu1DE0OzWjw7nnLZmJZYTDZZyEFHZdUhV8FkH5MCfoU1XMaxXovpyW5nq5scPqq0ZDP9Zyl04oQ==",
       "dev": true
     },
     "unset-value": {
diff --git a/package.json b/package.json
index 75871e2b..c0c5342b 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   "license": "GPL-3.0",
   "devDependencies": {
     "@mate-academy/eslint-config": "*",
-    "@mate-academy/scripts": "^0.3.6",
+    "@mate-academy/scripts": "^1.2.8",
     "eslint": "^5.16.0",
     "eslint-plugin-jest": "^22.4.1",
     "eslint-plugin-node": "^8.0.1",
diff --git a/src/makeRobotAccountant.js b/src/makeRobotAccountant.js
index 38b9758a..7803b7df 100644
--- a/src/makeRobotAccountant.js
+++ b/src/makeRobotAccountant.js
@@ -6,7 +6,15 @@
  */
 
 function makeRobotAccountant() {
-  // write code here
+  let count = 0;
+
+  return (a) => {
+    return (b) => {
+      count++;
+
+      return count > 3 && count % 2 === 0 ? 'Bzzz... Error!' : a + b;
+    };
+  };
 }
 
 module.exports = makeRobotAccountant;