Update README.md

Author: Praman1997

README.md

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 # De-Code
 This was my first project for cryptography, where I developed my own algorithm and, performed encryption and decryption over plain text so as to test it's integrity.
+
+It is all simple... 
+* The default PIN is "1238"
+* You can customise it to your will and have fun.
+
+All you have to do is run this program and it will create a file called "ciphered.txt".
+You can send this file to your friend, where he/she will have this "software" waiting for it.
+All your friend has to do is to paste the file in the same directory as the "software", and run it...
+
+Enjoy!