add ascinemasfor gcd and installation

Author: daria-z

Makefile

@@ -16,6 +16,9 @@ brain-even:
 brain-calc:
 	node bin/brain-calc.js
 
+brain-gcd:
+	node bin/brain-gcd.js
+
 brain-progression:
 	node bin/brain-progression.js
 

README.md

@@ -17,8 +17,9 @@ To get started, follow these steps:
 
 2. Install dependencies:
    ```bash
-   npm install
+   make install
    ```
+[![asciicast](https://asciinema.org/a/cMveoq2I0t43hTzcCo43wTuo1.svg)](https://asciinema.org/a/cMveoq2I0t43hTzcCo43wTuo1)
 
 ### 🛠️ **Makefile**
 
@@ -33,19 +34,22 @@ To get started, follow these steps:
 
 **Commands to Run Games**
 
-- **`make brain-games`**
+- **`make brain-games`** greeting the user
 [![asciicast](https://asciinema.org/a/2xgn4DG3Wy296ZyKb3WzmtaAf.svg)](https://asciinema.org/a/2xgn4DG3Wy296ZyKb3WzmtaAf)
 
-- **`make brain-even`**
+- **`make brain-even`** need to determine whether the number is even or not.
 [![asciicast](https://asciinema.org/a/5GjH4pyYKYdYAVe1PHjN32RS8.svg)](https://asciinema.org/a/5GjH4pyYKYdYAVe1PHjN32RS8)
 
-- **`make brain-calc`**
+- **`make brain-calc`** need to perform mathematical operations.
 [![asciicast](https://asciinema.org/a/ltJ1hPhVnQJ4o8p6JR1A2zEYH.svg)](https://asciinema.org/a/ltJ1hPhVnQJ4o8p6JR1A2zEYH)
 
-- **`make brain-progression`**
+- **`make brain-gcd`** need to calculate greatest common divisor.
+[![asciicast](https://asciinema.org/a/4qlaEL79rmoCsgPPW1ksEnt03.svg)](https://asciinema.org/a/4qlaEL79rmoCsgPPW1ksEnt03)
+
+- **`make brain-progression`** need to identify the missing number in the progression.
 [![asciicast](https://asciinema.org/a/6RCNWjdv4doJP0BSFbw2VhL1m.svg)](https://asciinema.org/a/6RCNWjdv4doJP0BSFbw2VhL1m)
 
-- **`make brain-prime`**
+- **`make brain-prime`** need to answer whether a number is prime.
 [![asciicast](https://asciinema.org/a/I17lxaolD2zkMQnVISIEAlWX2.svg)](https://asciinema.org/a/I17lxaolD2zkMQnVISIEAlWX2)
 
 ## 📂 Project Structure