Adding README file to support project

Author: japneetsingh035

README.md

@@ -197,3 +197,4 @@ SR No   | Project | Author
 100 | [Terminal Based Hangman Game](https://github.com/Python-World/python-mini-projects/tree/master/projects/Terminal_Based_Hangman_Game)| [neohboonyee99](https://github.com/neohboonyee99)
 101 | [Whatsapp Bot](https://github.com/Python-World/python-mini-projects/tree/master/projects/whatsapp_Bot)| [urmil89](https://github.com/urmil89)
 102 | [Zip Bruter](https://github.com/Python-World/python-mini-projects/tree/master/projects/Zip_Bruter) | [Erdoğan YOKSUL](https://www.github.com/eredotpkfr)
+103 | [CountDown Timer](https://github.com/Python-World/python-mini-projects/tree/master/projects/Countdown_timer) | [Japneet Kalra](https://github.com/japneetsingh035)

projects/Countdown_timer/README.md

@@ -0,0 +1,32 @@
+# Development
+Please have python3 installed to run this project on terminal:
+[Python3 Installation](https://www.python.org/downloads/)
+
+# CountDown Timer
+<!--Remove the below lines and add yours -->
+Countdown timer made using the Python time module and is a terminal game to countdown the time.
+
+### Prerequisites
+<!--Remove the below lines and add yours -->
+Modules required to be able to use the script successfully
+and how to install them.
+Please have python3 installed to run this project on terminal:
+
+
+### How to run the script
+<!--Remove the below lines and add yours -->
+```code
+python3 main.py
+```
+# Example
+Enter the time in seconds: 20
+00:20
+Timer completed!
+
+### Screenshot/GIF showing the sample use of the script
+<!--Remove the below lines and add yours -->
+![example](example.png)
+
+## *Author Name*
+<!--Remove the below lines and add yours -->
+[JapneetSingh](https://github.com/japneetsingh035)